How many protons and neutrons are there in the following nuclei ?
`._(6)C^(12)`,`._(8)O^(17)`,`._(12)Mg^(25)`,`. _(26)Fe^(56)`,`._(38)Sr^(88)`

Explanation

(i) `._(6) ^(13)C `, Atomic no. (Z) =6 `" "` Mass no.(A) = 13
No. of protons (p) =6 `" "`No. of neutrons (n) =13 -6 =7
(ii) `._(8)^(16)O` , Atomic no. (Z) =8 `" "` Mass no. (A) =16
No. of protons (p) =8 `" "` No. of neutrons (n) = 16-8 =8
(iii) `._(12)^(24) Mg` , Atomic no. (Z) = 12 `" "` Mass no. (A) =24
No. of protons (p) = 12 `" "` No. of neutrons (n) = 24-12 =12
(iv) `._(26)^(56)Fe` , Atomic no (Z) =26 `" "` Mass no. (A) = 56
No. of protons (p) = 26 `" "` No. of neutrons (n) = 56-26 =30.
(v) `._(38)^(88) Sr` , Atomic no (Z) =38 `" "` Mass no. (A) = 88
No. of protons (p) = 38 `" "` No. of neutrons (n) = 50.