Chemistry
An atom having mass number 13 has 7 neutrons. What is the atomic number of the atom ?
Atomic Structure
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Answer
Mass number (A) = Number of protons (Z) + Number of neutrons (N)
Mass number = 13
Neutrons = 7
Number of protons = Mass number - Number of neutrons
= 13 - 7
= 6
The atomic number of the atom is 6.
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