I’m confused how to do this

B. P (Phosphorus)

Explanation:

The element is be phosphorus.

This is true because phosphorus has a larger atomic radius than carbon. If you move than the group, elements gain additional electron shell. That additional electron shell keeps electrons far from the nucleus of the atom. This actually increases the atomic radius. Also, phosphorus is more electronegative than aluminum because phosphorus itself is a non-metal and non-metals are generally electronegative while aluminum is a metal and electropositive.  

Phosphorus has a lower ionization energy than argon because the ionization energy across the period (i.e from left to right) increases and across period 3, you will find phosphorus first before argon in the periodic table.

The correct answer is phosphorus.

Explanation:

Nucleic acids are macro molecules present in the living organism which controls the protein synthesis  and stores the complete description regarding the living organism. These nucleic acids are composed of carbon , hydrogen , oxygen , nitrogen and phosphorous.

There are two types of nucleic acid :