Question

write four quantum numbers for (a)1s1 (b)2p1 (c)3d1 (d)4f1 a. n=1, l=0, m = 0, s = +1/2 b. n=2, l=1, m = -1 or 0 or +1, s = +1/2 c. n=3, l=2, m= -2 or -1 or 0 or +1 or +2, s = +1/2 d. n=4, l=3, m= -3 or -2 or -1 or 0 or +1 or +2 or +3, s = +1/2

Answer 1

Circum-erosional or Relict or Residual mountains. Circum-erosional or Relictor Residual mountains (Aravalis in India, Urals in Russia etc.) are the remnants of old fold mountainsderived as a result of denudation [strip of covering or possessions; make bare].