2019 - JAMB Chemistry Past Questions and Answers - page 6

Z = 1s\(^2\) 2s\(^2\) 2p\(^6\) 3s\(^2\) 3p\(^1\)

\(\therefore\) We have Z\(^{3+}\) and SO\(_4 ^{2-}\)

The formula is:

 Z\(^{3+}\) + SO\(_4 ^{2-}\) \(\to\) Z\(_2\)(SO\(_4\))\(_3\).

The hybridization in a and b is sp\(^3\) hybridization while in c and d is sp hybridization.

Isoelectronic refers to two atoms, ions, or molecules that have the same electronic structure and the same number of valence electrons. Atoms or ions with the same electronic configurations are said to be isoelectronic to each other or to have the same isoelectronicity

Na\(^+\) = 10 electrons = 2, 8

Mg\(^{2+}\) = 10 electrons = 2,8

O\(^{2-}\) = 10 electrons = 2,8

Si\(^{2+}\) = 12 electrons = 2,8,2

\(\implies\) Si\(^{2+}\) is not isoelectronic with the rest.

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The given reaction is endothermic, as a result of that, a decrease in temperature will favour the exothermic side which is the backward reaction.

An azimuthal quantum number is a quantum number for an atomic orbital that determines its orbital angular momentum and describes the shape of the orbital. It is also known as the orbital angular momentum quantum number, orbital quantum number or second quantum number, and is symbolized as ℓ (pronounced ell).

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