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A portion belonging to the same period o...

A portion belonging to the same period of modern periodic table is given.
[`underset(13)\Al, underset(14)\Si, underset(15)\P, underset(16)S`]
a) Which one of the given elements belong to the boron family?
b) To which period does these elements belong to?
c ) What is the atomic number of the noble gas given in this period?
d) Which is the highest atom among the given elements?

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a) Al
b) 3
c) 18
d) Al
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