Consider the following elements:
Na, Cl, Ba, F, K, Br, Sr, Li, Ca.
Separate these elements into three groups of similar properties. Also give the basis of your classification?
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Answer:
on the basis of periodic table
1st group
Li, Na, K
2nd group
Ca, Ba, Sr
17th group
F,Cl,Br
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1 2 3
Li Ca F
Na Sr Cl
K Ba Br
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