Element 'A' belongs to 3rd period table and group 1 of the the modern

1.	Element 'A' belongs to 3rd period table and group 1 of the the modern periodic table .a) What is the atomic number of the element . b) Which element in the group is not metal .c)Which element in the same period has same valency as element A.
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Element 'A' belongs to 3rd period table and group 1 of the the modern periodic table .a) What is the atomic number of the element . b) Which element in the group is not metal .c)Which element in the same period has same valency as element A.

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