Question

Give the answer of the following with respect to element X:- 23 X 11 [3] i) How many Neutrons are there in X? ii) Identify X? iii) Give Electronic Configuration of X?
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Answer 1

GIVEN VALUES

Mass Number (a) = 23

Atomic Number (z) = 11

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i) How many Neutrons are there in X

Using, Mass Number = No. of Protons + No. of Neutrons

23 = 11 + No. of Neutrons

No. of Neutrons = 12

Hence, no of neutrons is 12

2) Identity X

As X has an atomic number of 11 and a mass number of 23 it is sodium

It is sodium element

3) Electronic configuration of X

Using Octate rule which states that an atom should have either 8 or 2 electrons to get balanced

Electronic Configuration = 2,8,1