Question

Question #05ab5

Answer 1

Covalent bonds are formed through the sharing of electrons between two non-metals.

Explanation:

There are two types of covalent bonds: polar and non-polar.

A polar molecule has an unequal sharing of electrons, which results in a partially positively charged end and a partially negatively charged end. This happens when two atoms have an electronegativity difference of greater than `0.5`.

A non-polar molecule has an equal sharing of electrons. This means that the molecule does not have charged ends. This happens when the two atoms in the covalent bond have similar electronegativities, or an electronegativity difference smaller than `0.5`.

In `N_2`, a covalent bond is formed between two nitrogen atoms, each sharing `3` electrons with one another. Have a look at this picture:

In `CH_4`, a covalent bond is formed between a carbon atom and `4` hydrogen atoms. The carbon atoms shares its `4` valence electrons to the other `4` hydrogen atoms.

In `C_2H_2`, a covalent bond forms between carbon and hydrogen. The two carbons bond together with a triple bond, and also one single bond, which is the hydrogen.