Q. 245.0( 1 Vote )

What information do you get from the figure given below about the atomic number, mass number and valency of atom X?


Answer :

From the figure:

Atomic number can be determined as 8. As the nucleus shows 8 protons also it can be determined because of the 8 electrons in the orbits.


Mass number is 8 + 10 = 18. Because there is written 10n which is 10 neutrons.


Valency can be determined by electronic configuration that is: 2, 6


So the valency is 2 because 2 electrons are required to complete the octet.


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