1.

Distinguish between the following:Atomic number and Atomic mass number.

Answer»
Atomic numberAtomic mass number
1. The number of electrons or protons in an atom is called the atomic number.1. The sum of the number of protons and neutrons in the nucleus of an atom is called the atomic mass number.
2 All the isotopes of an element have the same atomic number.2. Different isotopes of the same element have different mass numbers.
3. The atomic number is represented by the letter Z.3. The atomic mass number is represented by the letter A.


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