Element with atomic number 15 and mass number 31 is present in

see full answer

High-Paying Jobs That Even AI Can’t Replace — Through JEE/NEET

🎯 Hear from the experts why preparing for JEE/NEET today sets you up for future-proof, high-income careers tomorrow.

An Intiative by Sri Chaitanya

group 15 and period 3

group 15 and period 4

group 5 and period 4

group 5 and period 3

answer is C.

(Unlock A.I Detailed Solution for FREE)

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

The element with atomic number 15 and mass number 31 is phosphorus (P). It is located in:

Correct Answer: Group 15 and Period 3.

Explanation:

Group 15: Phosphorus belongs to Group 15 because it has 5 valence electrons (ns²np³ configuration).
Period 3: Its outermost electrons are in the third energy level (3s and 3p orbitals).

Thus, phosphorus is in Group 15 and Period 3 of the periodic table.

Watch 3-min video & get full concept clarity

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test