Question
Define the terms:
i. Isotones
ii. Isoelectronic species
iii. Electronic configuration
i. Isotones
ii. Isoelectronic species
iii. Electronic configuration
✓
Answer
i. Isotones: Isotones are defined as the atoms of different elements having same number of neutrons in their nuclei. e.g. ${ }_5^{11} B$ and ${ }_6^{12} C$ having 6 neutrons each are isotones.
ii. Isoelectronic species:
soelectronic species are defined as atoms and ions having the same number of electrons.
e. g. $Ar _{,} Ca ^{2+}$ and $K ^{+}$containing 18 electrons each.
iii. Electronic configuration:
Electronic configuration of an atom is defined as the distribution of its electrons in orbitals.
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