Question
‘The modern periodic table consists of elements arranged according to their increasing atomic numbers’. With reference to elements with atomic numbers $1$ to $20$ only in the periodic table $–$ differentiate them into $–$ metallic elements, metalloids, non$-$metals $\&$ noble gases.

Answer

Names and symbols of metal, non$-$metals, metalloids and noble gases out of $1^{st} 20$ elements.
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