Chemistry
Define the term - 'mass number' of an atom. If an atom 'B' has mass number 35 & atomic number 17, state the number of protons, electrons & neutrons it contains.
Atomic Structure
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Answer
Mass number is equal to the total number of protons & neutrons in the atom of an element.
If,
mass number [A] = 35,
atomic number [Z] = 17 then
number of protons = number of electrons = 17
number of neutrons [n] = A - Z = 35 - 17 = 18 neutrons
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