Chemistry, asked by AngieIsBadAtMath, 17 hours ago

Calculate the number of electrons,protons and neutrons.

40
a) Ar
18

14
b) N
7

39
c) K
19

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Answers

Answered by Prakhar2708
1
(A) e - 18
p - 18
n - 22

(B) e - 7
p - 7
n - 7

(C) e - 19
p - 19
n - 20



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Answered by mishraadarsh2244
1

Explanation:

see mass number is proton + Neutron

so if we Subtract proten we get Neutron

and atomic number = number of protons since atom is electrically neutral it has same number of electrons so atomic number = p+e

so number of protons = atomic number = number of nutron

and Neutron = atomic number -mass number

18 protons and neutrons in argon

and neutrons = 40-18

= 22 we do rest accordingly

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