[" From to following nuelei,choose the isotones and the bolurs: "],[" (i) "8p+8n" (ti) "8p+9n" (iii) "18p+22n" (iv) "20p+20n" ."]

From the following nuclei, choose the isotopes and isobars : (i) 8p + 8n , (ii) 8p +9n , (iii)18p + 22n , (iv)20p + 20n

(a) The element helium has 2 electrons in its valence shell but its valency is not 2. Explain (b) Choose the isotopes from the following nuclie: (i)8p+8n,(ii) 8p+9n,(iii) 18p +22n ,(iv)20p+20n

Identify the isotopes and isobars from the following list of atoms with given number of protons and neutrons. A:8p+9nB:8p+8nC:18p+22nD:20p+20n .

Find t_(n) for following A.P., and then find 30th term of A.P. 3,8,13, 18,…….

Find t_(n) for following A.P., and then find 30th term of A.P. 3,8,13, 18,…….

Arrange the following in the increasing order of their basicities. (I) p- Toluidine (II) N,N- Dimethyl-p-toluidine (III) p- Nitroaniline (IV) Aniline.

Simplify the following using the formula a^m xx a^n = a^(m+n) : p^5 xx p^8 .