Question

Define the following terms :
(a) Atomic number (b) Mass number
(c) Nucleons (d) Valence shell​

Answer 1

ATOMIC NUMBER- NO OF PROTONS PRESENT IN NUCOEAS IN THE ATOM IT IS REPRESENTD BY Z

MASS NUMBER- IT IS THE SUM OF PROTONS AND NEUTRONS PRESENT IN NUCLEAS OF THE ATOM

NUCLEONS- IT IS THE NUMBER OF NEUTRAL ATOMS OR NEUTRONS IN AN ATOM

VALENCE SHELL - THE OUTERMOST SHELL OF AN ATOM IN WHICH ELECTRONS ARE PRESENT IS CALLED VALENCE SHELL

HOPE THAT THIS WILL HELP YOU OUT ✔✔

Answer 2

Answer:

a) Atomic number is the number of positive charges or protons in the nucleus of an atom of a given element, and therefore also the number of electrons normally surrounding the nucleus.

B) mass number is the sum of the number of protons and neutrons in an atom

C) a nucleon is either a proton or a neutron, considered in its role as a component of an atomic nucleus

D) The valence shell is the outermost shell of an atom

Explanation: