An element has an atomic mass number of 16 and an atomic number of 7. The element has protons and neutrons.
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The element has 7 protons which is the atomic number and 9 neutrons.
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The number of protons and atoms in an element is normally equal. If the atomic number is 7 then it is automatically that the number of protons is 7.
protons + neutrons = mass number.
therefore the number of neutrons is 16 - 7=9
when protons are added to neutrons what is obtained is known as the mass number as well reverse procedure might be taken in order to obtain the number of protons and neutrons in that order .
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