can u please solve these for me
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a)
Na
P
Ar
S
Cl
Mg
Al
Si
b)
These elements belong to THIRD period
C)
Biggest atom - Na
Smallest atom - Si
d)
Atomic number of aluminium - 13
Elec. config. - 2 , 8 , 3
e)
electronic of element with atomic number 17 -
2 , 8 , (7)
Valency - 1
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