Ionska vez je ena od glavnih kemijskih vezi, ki nastane... Show more
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Updated Apr 14, 2026
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Kaj je Ionska Vez?
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Uvod v ionsko vez
Verjetno se sprašuješ, kako se atomi povezujejo med seboj, da nastanejo različne snovi okoli nas? Ionska vez je ena od ključnih rešitev te ugakne!
Ta vez nastane med kovinami in nekovinami, ko gre za popoln prenos elektronov. Kovine rade oddajajo elektrone, nekovine pa jih rade sprejemajo. Tako enostavno je!
Ion je atom, ki je postal električno nabit - kation je pozitivno nabit (oddal elektrone), anion pa negativno nabit (sprejel elektrone). Med nasprotno nabitimi ioni nastane močna privlačna sila - to je ionska vez.
Zapomnij si: Ionska vez = kovine + nekovine = popoln prenos elektronov!
Kako nastane ionska vez
Proces je pravzaprav precej logičen, če razumeš oktetno pravilo - atomi hočejo imeti 8 elektronov v zunanji lupini, ker je to najbolj stabilno.
Ko se atom kovine sreča z atomom nekovine, kovina "podarje" svoje valenčne elektrone. Tako postane pozitiven kation, nekovina pa negativen anion. Med njima nastane močna elektrostatična privlačnost.
Toda ioni se ne povezujejo samo v pare! Zaradi močnih sil se uredijo v ionsko kristalno mrežo - to je urejena 3D struktura, kjer je vsak kation obdan z več anioni in obratno.
Pazi: Pri ionskih spojinah ne nastanejo molekule, ampak kristali!
Primeri nastanka ionske vezi
Poglejmo si natrijev klorid (NaCl) - običajno kuhinjsko sol. Natrij ima 1 valenčni elektron, ki ga rad odda, klor pa potrebuje 1 elektron za popoln oktet.
Natrij postane Na⁺, klor pa Cl⁻. Med njima nastane ionska vez v razmerju 1:1, zato je formula NaCl.
Pri magnezijevem fluoridu (MgF₂) je zgodba malo drugačna. Magnezij odda 2 elektrona, vendar vsak fluor sprejme le 1 elektron. Potrebujemo torej 2 atoma fluora za 1 atom magnezija - formula je MgF₂.
Pomembno: Vedno preveri naboje, da bo skupni naboj spojine enak 0!
Lastnosti ionskih spojin
Ionske spojine imajo specifične lastnosti, ki jih lahko razložimo z močnimi vezmi in urejeno kristalno mrežo.
So trde snovi z zelo visokimi tališči - potrebno je namreč veliko energije, da razbiješ močne elektrostatične sile. Hkrati so krhke - če po kristalu udariš, se plasti premaknejo in ioni z enakim nabojem se odbijejo.
Topnost je odvisna od topila - v vodi se večinoma dobro topijo, v olju pa ne. Razlog je v tem, da polarne molekule vode "izvlečejo" ione iz kristalne mreže.
Električna prevodnost je klasično testno vprašanje! Trdne ionske spojine ne prevajajo elektrike, ker so ioni ujeti v mreži. Ko pa se spojina stali ali raztopi v vodi, postanejo ioni gibljivi in prevajajo elektriko.
Za test: Trdna sol ne prevaja, raztopina soli pa prevaja - razlog je gibljivost ionov!
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Where can I download the Knowunity app?
You can download the app in the Google Play Store and in the Apple App Store.
Is Knowunity really free of charge?
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The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
Kaj je Ionska Vez?
Ionska vez je ena od glavnih kemijskih vezi, ki nastane med kovinami in nekovinami. Gre za popoln prenos elektronov, ne za deljenje, s čimer atomi dosežejo stabilno elektronsko konfiguracijo.
Uvod v ionsko vez
Verjetno se sprašuješ, kako se atomi povezujejo med seboj, da nastanejo različne snovi okoli nas? Ionska vez je ena od ključnih rešitev te ugakne!
Ta vez nastane med kovinami in nekovinami, ko gre za popoln prenos elektronov. Kovine rade oddajajo elektrone, nekovine pa jih rade sprejemajo. Tako enostavno je!
Ion je atom, ki je postal električno nabit - kation je pozitivno nabit (oddal elektrone), anion pa negativno nabit (sprejel elektrone). Med nasprotno nabitimi ioni nastane močna privlačna sila - to je ionska vez.
Zapomnij si: Ionska vez = kovine + nekovine = popoln prenos elektronov!
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Kako nastane ionska vez
Proces je pravzaprav precej logičen, če razumeš oktetno pravilo - atomi hočejo imeti 8 elektronov v zunanji lupini, ker je to najbolj stabilno.
Ko se atom kovine sreča z atomom nekovine, kovina "podarje" svoje valenčne elektrone. Tako postane pozitiven kation, nekovina pa negativen anion. Med njima nastane močna elektrostatična privlačnost.
Toda ioni se ne povezujejo samo v pare! Zaradi močnih sil se uredijo v ionsko kristalno mrežo - to je urejena 3D struktura, kjer je vsak kation obdan z več anioni in obratno.
Pazi: Pri ionskih spojinah ne nastanejo molekule, ampak kristali!
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Primeri nastanka ionske vezi
Poglejmo si natrijev klorid (NaCl) - običajno kuhinjsko sol. Natrij ima 1 valenčni elektron, ki ga rad odda, klor pa potrebuje 1 elektron za popoln oktet.
Natrij postane Na⁺, klor pa Cl⁻. Med njima nastane ionska vez v razmerju 1:1, zato je formula NaCl.
Pri magnezijevem fluoridu (MgF₂) je zgodba malo drugačna. Magnezij odda 2 elektrona, vendar vsak fluor sprejme le 1 elektron. Potrebujemo torej 2 atoma fluora za 1 atom magnezija - formula je MgF₂.
Pomembno: Vedno preveri naboje, da bo skupni naboj spojine enak 0!
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Lastnosti ionskih spojin
Ionske spojine imajo specifične lastnosti, ki jih lahko razložimo z močnimi vezmi in urejeno kristalno mrežo.
So trde snovi z zelo visokimi tališči - potrebno je namreč veliko energije, da razbiješ močne elektrostatične sile. Hkrati so krhke - če po kristalu udariš, se plasti premaknejo in ioni z enakim nabojem se odbijejo.
Topnost je odvisna od topila - v vodi se večinoma dobro topijo, v olju pa ne. Razlog je v tem, da polarne molekule vode "izvlečejo" ione iz kristalne mreže.
Električna prevodnost je klasično testno vprašanje! Trdne ionske spojine ne prevajajo elektrike, ker so ioni ujeti v mreži. Ko pa se spojina stali ali raztopi v vodi, postanejo ioni gibljivi in prevajajo elektriko.
Za test: Trdna sol ne prevaja, raztopina soli pa prevaja - razlog je gibljivost ionov!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
We thought you’d never ask...
What is the Knowunity AI companion?
Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.
Where can I download the Knowunity app?
You can download the app in the Google Play Store and in the Apple App Store.
Is Knowunity really free of charge?
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
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4.6/5
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4.7/5
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user