an element with atomic number 20
a . write it's electron configuration and valancy
b . it is metal or non. metal
c . write it's formula of chloride
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Answered by
1
Answer:
Electronic configuration is 2,8,8,2 and Valency Is 1 and 2(It has variable valency)
It is a metal(Calcium)
Formula of chloride→XCl2 (CaCl2)
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Answered by
0
Answer:
It is a calcium .
1s2,2s2,2p6,3s2,3p6,4s2
its valency is 2 .
it is a metal .
chloride = cl
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