Count the atomic number and atomic mass number of NA [Electrons -11,Neutron -12
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TOPIC :- ATOMIC STRUCTURE
CONCEPT :- In a neutral atom, number of electron = number of proton = atomic number. Atomicass number is the sum of number of protons and number of neutrons in the nucleus of an atom.
SOLUTION :-
Given, Number of electrons in Na = 11.
Thus, number of proton = 11.
Hence, atomic number = 11
Atomic Mass number = no. of proton + no. of neutron
= 11 + 12 = 23.
Hence, mass number of Na is 23.
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