UPSC NDA I 2017 General Ability Solved Paper

© examsiri.com

Question : 148 of 150

Marks: +1, -0

The valency of an element depends upon the

[NDA I 2017]

total number of protons in an atom
mass number of an atom
total number of neutrons in an atom
total number of electrons in the outer most shell of an atom

Go to Question:

Prev Question

Next Question