Atomic number is equal to the number of protons in the nucleus in an atom. Given the notation (Z)
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What is the definition of an atom
An atom is the smallest particle of an element which has the characteristics of the elements. It consists of 3 subatomic particles (protons, neutrons and electrons)
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What is the definition of mass number
It is the total number of protons and neutrons in the nucleus of an atom. Given the notation (A)
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What is the definition of isotope
An isotope is an atom of the same element which has a different mass number but the same atomic
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