Ion formation vs molecule

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Amina Durrani 3G
Posts: 52
Joined: Sat Jul 20, 2019 12:16 am

Ion formation vs molecule

Postby Amina Durrani 3G » Sat Nov 02, 2019 5:01 pm

How do you know if the lowest energy can be achieved by ion formation or if it can be achieved by sharing electrons? Like how do you know when you should write Na+Cl- or just NaCl?

Kavee Dodampahala 4E
Posts: 51
Joined: Sat Jul 20, 2019 12:17 am

Re: Ion formation vs molecule

Postby Kavee Dodampahala 4E » Sat Nov 02, 2019 7:43 pm

To see if an ionic or covalent bond would from you should look at the difference in electronegativity between the two atoms involved in the bond. If the electronegativity difference is greater than than 2 then an ionic bond will form. If the electronegativity difference is less than 1.5 then a covalent bond will form.

BryantChung_4B
Posts: 45
Joined: Sat Aug 24, 2019 12:17 am

Re: Ion formation vs molecule

Postby BryantChung_4B » Sun Nov 03, 2019 7:19 am

The lowest energy is basically just a way of saying which bond is likely to form. NaCl, for example has a large electronegativity difference between Na and Cl, making it ionic.


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