Name the element whose atomicity is
(a)Tetra atomic
(b)diatomic

a

Explanation:

because its measure it

Phosphorus is a tetra atomic element as it always exists as .

Names of Mono and Tetra atomic elements

Explanation:

The total number of atoms present in the molecule is called atomicity.

Based upon atomicity, the molecules are classified as mono atomic, diatomic, triatomic, and poly atomic molecules.

Mono atomic element:

The element which is made up of only one atom, they are called a mono atomic element.

The examples include Sodium, Zinc, Magnesium, Helium, Neon etc.

Tetra atomic element:

The elements which is made up of 4 atoms of same molecules, they are called a tetra atomic element.

Phosphorus is a tetra atomic element as it always exists as .

hope this helps have a nice night❤️

Explanation:

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.