PLEASE HELP ME ASAP Explain why each of these elements occurs as diatomic molecules. Match the words in the left column to the appropriate blanks in the sentences on the right.

The explanation as to why each of the elements occurs as diatomic molecules is as follows;

Hydrogen atom has only the 1 shell and 1 valence electron and an Hydrogen molecule is formed when the duet is achieved.

When two halogen like Chlorine, Cl (each with a valency of 7) atoms yields a single bond to achieve a complete octet which is stable. Each Cl will contribute 1 electron each to form a single bond..

Upon bonding of two oxygen atoms, a double bond is formed to achieve a complete octet which is a stable configuration.

Oxygen has a valency of 6 and needs 2 more electrons to complete its octet configuration. Each oxygen atom will contribute 2 electrons each to form a double in order to complete it octet configuration.

When two nitrogen atom pair together, they form a triple bond to achieve a complete octet which is stable.

Nitrogen has a valency of 5 and needs 3 more electrons to assume an octet configuration. Each nitrogen atom will contribute 3 electrons each to form a triple bond in order to complete its octet configuration.

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The answer to your question is given below

Explanation:

1. When two hydrogen atoms pair together, they form a single bond to achieve complete duet.

Hydrogen atom has 1 shell and 1 valence electron and they contribute it to form bond, thereby obtaining a stable duet configuration

H + H —> H–H —> H2

2. When two halogen atom pair together, they form a single bond to achieve a complete octet which is stable. For example, Cl has 7 electrons in its outermost shell and need 1 more electron to complete it octet. Each Cl will contribute 1 electron each to form a single bond..

Cl + Cl —> Cl–Cl —>Cl2

3. When two oxygen atoms pair together, they form double bond to achieve a complete octet which is a stable configuration.

Oxygen has 6 electrons in its outermost shell and needs 2 more electrons to complete its octet configuration. Each oxygen atom will contribute 2 electrons each to form a double in order to complete it octet configuration.

O + O —> O=O —>O2

4. When two nitrogen atom pair together, they form a triple bond to achieve a complete octet which is stable. Nitrogen has 5 electrons in its outermost shell and needs 3 more electrons to complete it octet configuration. Each nitrogen atom will contribute 3 electrons each to form a triple bond in order to complete its octet configuration.

N + N —> N≡N —> N2.