Question

Which is an example of a covalent bond?

Select one of the options below as your answer:



A.
Chlorine accepts an electron from calcium to form a stable bond.




B.
Ions in a bar of pure iron are surrounded by a large number of valence electrons.




C.
There are less than 16 valence electrons in 2 chlorine atoms, but they form a stable bond.

HEEEELP

Answer 1

Covalent bonds share electrons between two atoms

Answer 2

first, learn what is valence shell and valence electrons

Answer 3

each shell can be occupied to a number of electrons
example:
1st shell: 2 maximum electrons
2nd shell: 8 maximum electrons

since Nitrogen has 7 electrons, it means that the first shell is fully occupied with 2 and that the valence shell is occupied by 5 valence electrons, making it able to obtain 3 more electrons in order to fully occupy its valence shell