Question

Metal
Metalloid
Nonmetal
State the law on which modern periodic table is based.
Where will the isotopes of the element 'X' be placed in the modern periodic table?
How many valence electrons are present in an atom of element 'Y'?
What is the periodic trend observed in the variation of atomic radius while going from
left to right within a period?
Explain with reason why nonmetallic character decreases down a group.​

Answer 1

Explanation:

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