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Subjects
Science CBSE
Class 9 New
Journey inside the atom
Pumpa Practice Questions
18.
Calculate the mass number
Exercise condition:
3
m.
Composition of the nuclei of two atomic species X and Y are given as under
X
Y
Protons
\(6\)
\(7\)
Neutrons
\(8\)
\(8\)
Give the
mass number
of X and Y:
Mass number \(=\)
Number of protons + Number of electrons
Number of protons + Number of neutrons
Number of protons - Number of neutrons
Number of electrons + Number of neutrons
Mass number of
X
\(=\)
\(12\)
\(14\)
\(10\)
\(15\)
Mass number of
Y
\(=\)
\(15\)
\(17\)
\(14\)
\(13\)
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