an element x has atomic number of 40 and atomic mass 79.88. what is the mass number? what are the number of electrons protons and neutrons in that atom
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Atomic number =40
Atomic mass=79.88
Mass number =atomic mass(rounded of)
=80
No of protons =no of electrons = atomic number =40
No of neutrons =mass number - no of protons
=80-40=40
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