What information do you get from the Fig. 4.4 about the atomic number, mass number and valency of atoms X, Y and Z? Give your answer in a tabular form.

AcademicChemistryNCERTClass 9

The atomic number, mass number, and valency of the atoms X, Y and Z are given on the table below:-

Atomic No.Mass No.Valency

[Extra information: The total number of protons in the nucleus of an atom gives us the atomic number of that atom (Z).

The number of protons and neutrons combined gives us the mass number of an atom (A). 

The valency of an element is the number of electrons that must be lost or gained by an atom to obtain a stable electron configuration.]

Updated on 10-Oct-2022 13:32:24