Define atom number and mass number …
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Posted by Gangadhar Naik 7 years, 1 month ago
- 3 answers
Yogita Ingle 7 years, 1 month ago
Atomic number: Atomic number (z) is the number of protons in an atom; it is also equal to the number of electrons in the atom.
Atomic number = Number of protons
Example: The atomic number of an element is 12 then its atom contains 12 protons and 12 electrons.
Mass Number: The mass number (A) is defined as the sum of the number of protons and neutrons present in the nucleus of an atom. Example: Mass number of Nitrogen atom is 14 then it contains 7 protons and 7 neutrons.
Mass number = Protons + Neutrons
Akanksha Maurya 7 years, 1 month ago
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Siddhee Singh 7 years, 1 month ago
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