Question

Mass number and neutron number of an element is 23 and
12 respectively. Calculate its atomic number and electron
number,​

Answer 1

Answer:

12 & 12

Explanation:

atomic number is the no. of protons or neutrons

hence atomic no. is 12

Now, no. of electrons in the atom is the atomic no.

hence electron no. is also 12

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Answer 2

Answer:

mass number = A = n+p = 23

neutron number = n = 12

atomic number = Z = A-n = p = 23-12 = 11

electron number = p = 11

Explanation:

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