Options:
A.
B.
C.
D.
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Earlier discussion
2 older comments kept for context.
banye Samuel
c, 2,8,8,2 for CA
2,8,2 for mg the correct answer is c for their chemical properties
Mahymhunah Teslim
Element in the same group have the same number of valence electrons. Alkaline earth metals are the group 2 elements.
Teslim Memunat