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Q.

Atomic number and mass number of an element M are 25 and 52 respectively. The number of electrons, protons and neutrons in M+2 ion are respectively.

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a

25, 27 and 25

b

23, 25 and 27

c

27, 25 and 27

d

25, 25 and 27

answer is D.

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Detailed Solution

 2552M+2  ;  Z=25 =  p,  e=25−2 = 23A=52n=A−Z=52−25=27

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Atomic number and mass number of an element M are 25 and 52 respectively. The number of electrons, protons and neutrons in M+2 ion are respectively.