Question

a gaseous non metal of period 2
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Answer 1

Answer:

carbon, boron

Explanation:

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Answer 2

ANSWER

C , N, O and F are non metals present in period 2

Elements to the left of period 2 are metals, those to the right are non-metals. The elements on the right, nitrogen, oxygen, fluorine and neon all have low melting points and are all non-metals.