Question

Which of the below elements are part of a group? Feel free to use the periodic table.

A. H, He, O, C

B. Be, Mg, Ca, Sr

C. Li, Be, C, O

D. H, Li, Na, Mg

Answer 1

B. Be, Mg, Ca, Sr

Step-by-step explanation:

Be, Mg, Ca, Sr are parts of the alkaline Earth metal family/group. So they are the second most reactive elements following behind alkali metals. Furthermore, Be, Mg, Ca, Sr all have 2 valence electrons that lose them to form cations. They have low melting points, low boiling points, can conduct electricity, have high malleability and ductility.

Hope it helped!

Answer 2

B. Be, Mg, Ca, Sr (hope this helps)