Atomic number = Number of protons. For a neutral atom, Number of electrons = Number of protons. Mass number = Number of protons + Number of neutrons. Valency is related to the number of electrons an atom gains, loses, or shares to form chemical bonds.
For Aluminium (Al) (atomic number : 13, mass number : 27), which one among the following statements is NOT correct ?
Asked in UPSC NDA 2 2024 · Topic: Atomic Structure (Isotopes, Isobars, and Isotones)
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