carbon and nitrogen have same atomic mass of 14u. Will they have the same valency ? Explain
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Nitrogen-14 is actually an isotope of nitrogen, so right from the start, you can say that it is a neutral atom.
Isotopes are atoms that have the same number of protons but different numbers of neutrons in the nucleus. You know that nitrogen-14 has 7
protons in the nucleus because it is an isotope of nitrogen, which has an atomic number equal to 7 .
Because nitrogen-14 is a neutral atom, the number of protons it has in its nucleus must be equal to the number of electrons that surround its nucleus.
neutral atom
⇒no. of protons = no. of electrons
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