Why molecules are formed?

Question

Doesn’t more electrons mean more repulsion?

In: Chemistry

Answer 1

There’s something called the octet rule, it says that for a molecule to be stable it has to have 8 electrons in its last valence shell so it has the same electronic configuration as a noble gas, so when a molecule is formed it has 8 electrons on its last energy level, that’s why noble gases don’t react, because they already have 8 electrons on the last valence shell.