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c-atomic number 10 which is neon(ne) belongs to group 18.
b-atomic number 7 which is nitrogen(n)belomgs to group 15.
all these elements belongs to 2nd period.
b-atomic number 7 which is nitrogen(n)belomgs to group 15.
all these elements belongs to 2nd period.
786Farhan78611:
and "A"
a is boron- which belongs to group 13.
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element belongs to the group 18
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