Question

What do all the light metals have in common?

A. All have the same number of electron shells.
B. All have the same atomic weight.
C. All have just 1 or 2 electrons in their outer orbit.
D. All appear yellow under a microscope.

Answer 1

d all apear yellow under a micrscope

Answer 2

C. All have just 1 or 2 electrons in their outer orbit.

Step-by-step explanation:

The light metals in the periodic table include: Lithium (Li), Beryllium (Be), Magnesium (Mg), Aluminum(Al) and Titanium (Ti).

Li belongs to Group 1 i.e. alkali earth metals with an outer electron configuration of 2s¹

Be and Mg to Group 2 i.e. alkaline earth metals with an outer electron configuration of 2s² and 3s² respectively

Al belongs to group 13 with an outer electron configuration of 3s²3p¹

Ti belongs to the transition metal series 4s²3d²

Li and Al have one electron in their outermost orbit whereas the rest have two electrons.