The ion ${ }^{55}{\mathrm{Mn}}^{2+}$ contains which combination of protons, neutrons and electrons?

	Protons	Neutrons	Electrons
A	25	30	23
B	25	55	23
C	27	30	25
D	30	25	28

 

The ion ${ }^{55}{\mathrm{Mn}}^{2+}$ contains which combination of protons, neutrons and electrons is 25, 30, 23.

No. of protons $=25$

No. of neutrons $=55-25=30$

No. of electrons $=25-2=23 {\mathrm{e}}^{-}$

Hence, the option A is correct.