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

B. Be, Mg, Ca, Sr

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.

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