Strontium, barium, and radium are grouped together on the Periodic Table of the Elements because they all have
A B C D
a bright silver and white coloring. similar electron configurations. strong radioactive properties. few or no stable isotopes.
Question: Strontium, barium, and radium are grouped together on the Periodic Table of the Elements because they all have
(A) a bright silver and white coloring.
(B) similar electron configurations.
(C) strong radioactive properties.
(D) few or no stable isotopes.

Answer: (B) similar electron configurations.
Answer: (C) strong radioactive properties.
Question: Strontium, barium, and radium are grouped together on the Periodic Table of the Elements because they all have
(A) a bright silver and white coloring.
(B) similar electron configurations.
(C) strong radioactive properties.
(D) few or no stable isotopes.
Answer: (B) similar electron configurations.