give two points of difference between atomic number mass number
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The number of protons determines an element's atomic number and is used to distinguish one element from another. ... Together, the number of protons and the number of neutrons determine an element's mass number.
Explanation:
The atomic number is the number of electrons present in an atom. It is equal to the number of protons in a neutral atom. It is denoted by symbol z.
The mass number, also called atomic mass number or nucleon number, is the total number of protons and neutrons in an atomic nucleus.
It is represented by A.
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