Question

fill the complete table

Answer 1

Explanation:

1) if 11 is atomic number then

Mass Number is 22.98

No.of protons = 11

( mass number = no.of neutrons + no.of protons)

No.of electrons= 11

complete symbol of element= sodium ( Na)

2) atomic number = Cobalt, a transition metal, has an atomic number of 27.

mass number is given

proton= 27

neutrons = 32

symbol of element =Cobalt ( Co)

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