How many electrons do these have in the valence shell?

Question

A. Alkali metals

B. Alkaline earth metals

C. Halogens

D. Noble gases

Answer 1

A-1, B-2, C- 1 less than the noble gas immediately to the right of them, and D-usually 8.  

Answer 2

Valence electrons refer to those electrons in the outer shell.

A: 1

B: 2

C: 7

D: 8, except Helium which has 2

Answer 3

Alkali metals = 1 valence electron

Alkaline earth metals = 2 valence electrons

Halogens = 7 valence electrons

Noble gases = 8 valence electrons (except Hydrogen, which has 2 valence electrons)

Answer 4

A. 1 valence electron. (Includes Hydrogen).

B. 2

C. 1  (But a further 6 are available).

D. Except for Helium (2 electrons only), They have 8 valence electrons in their Outer shell but, they're very stable and unreactive, Helium is reactive with its only 2 electrons in its outer shell.