both IE and IE are higher and hence X is the noble gas. For Y, the first ionisation energy is low and second ionisation energy is very high and hence Y is most reactive metal. For Z, both IE and IE are higher and hence it is least reactive. .
Cl(g) + e – → Cl – (g) ∆ H = kJ mol – For one mole ( .5g) kJ is released. ∴ For .75g chlorine, kJ g g energy leased. ∴ The amount of energy released = kJ Covalent radii - th period elements Covalent radii (in Å) Atomic number . .
. . Activitiy : . Covalent radii - 2nd group elements Covalent radii (in Å) Atomic number .
. . . Covalent radii - th group elements Covalent radii (in Å) Atomic number .
. Covalent radii - rd period elements Covalent radii (in Å) Atomic number . . .
11th Std Chemistry 11th Std Chemistry - - - - . (c) Argon . (a) Y > Z > X > A . (c) .
(a) 1s , 2s , 2p , 3s . (c) Oxygen . (c) + kcal mol - . (a) s > p > d > f .
(d) None of these . (b) kJ mol - . (a) . (a) Generally increases .
(d) Be and Al I Choose the best answer: . (d) bibibium . (b) AB . (d) f-block elements .
(a) I < Br < Cl < F (increasing