The nucleus of an atom has 5 protons and 6 neutrons. What would be the (a) atomic number, (b) mass number, (c) the number of electrons, and (d) the number of valence electrons, per atom of this element?

Academic Chemistry NCERT Class 9

(a) Atomic number = 5

(b) Mass no. = 6 + 5 = 11

(c) No. of electrons = 5

(d) No. of valence electrons per atom of the element is 3.

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Updated on: 10-Oct-2022

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