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Question
Define the following form:
Atomic mass number
Solution
It is the sum of total number of protons and neutrons present in a nucleus.
- atomic mass number = number of protons + number of neutrons.
- Atomic number = number of protons = number of electrons. It is denoted by Z.
- Mass number = number of protons + number of neutrons. It is denoted by A.
- For example: Carbon atom its,
- Number of proton = 6
- Number of neutrons = 6
- Number of electron = 6
- Atomic number (Z) = number of protons = number of electrons = 6.
- Mass number (A) = number of proton + number of neutrons = 6 + 6 =12.
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