Question

the three elements calcium Strontium and barium have similar property option A all are metals option B H has an oxide option C is has valency 2 option d all the above​

Answer 1

Option (A) all are metals

Answer 2

Answer:

option :D(All the above )

Explanation:

all those elements are belongs to second-A group in periodic table ,so

2-A group having valencey 2.

All the 2-A group elements are alkaline earth metals .

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