Question

1. What ion will be formed by the phosphorus atom shown below when it has a stable set of valence electrons?

O A P5+
O B P3+
О С p5-
O D P3-​

Answer 1

Answer:

d

Explanation:

i dont know why it just is

Answer 2

The ion that will be formed by the phosphorus atom when it has a stable set of valence electrons is $\[{P^{3 - }}\]$. Thus, the correct option is D.  

Explanation:

• Phosphorus has the atomic number 15.
• The shell electronic configuration of the phosphorus atom is 2, 8, 5.
• It has 5 electrons in its outermost shell, i.e. it has 5 valence electrons.
• It requires 3 more electrons to complete its octet.
• Therefore, it has a tendency to gain three more electrons. It has a valency 3.
• If an atom gains an electron, it acquires a negative charge.
• Therefore, if the phosphorus atom gains 3 electrons to have a  stable set of valence electrons, it will acquire a 3 unit negative charge.
• Thus, the ion formed will be $\[{P^{3 - }}\]$.