Question

Which statement about the elements in the periodic table is true?

A) The number of valence electrons increases as atomic mass increases.
B) The reactivity of alkali metals increases as atomic mass increases.
C) The number of valence electrons decreases across a period.
D) The reactivity of the halogens increases as atomic mass increases.

Answer 1

The answer is B) The reactivity of alkali metals increases as atomic mass increases. Just checked on Gradpoint and it was correct!

Answer 2

b) The reactivity of alkali metals increases as atomic mass increases.