Element Y consists of diatomic molecules, Y2. One Y2 molecule contains 14 protons. If the nucleon number of Y is 16, deduce the number of neutrons present in one atom of Y. ?

what is the meaning of nucleon number?

1 Answer
Junaid Mirza
Apr 17, 2018

#9# neutrons

Explanation:

Nucleon: a proton or a neutron
Nucleon number: Sum total of neutrons and protons. Also called mass number.

In a #"Y"_2# molecule (containing #"2 Y"# atoms) there are #14# protons. So, number of protons in a single #"Y"# atom is #14/2 = 7#

For a #"Y"# atom
Nucleon number = Number of protons + Number of neutrons

#16 = 7 +# Number of neutrons

Number of neutrons#= 16 - 7 = 9#

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