JEE Main · 2019 · 10 Jan 2019 · Shift 1 · Classification of Elements and Periodicity

The electronegativity of aluminium is similar to

(A)carbon
(B)beryllium✓ Correct
(C)boron
(D)lithium

Answer: (B)

Solution

Aluminium sits diagonally across from beryllium in the periodic table, and elements on such a diagonal share a similar charge-to-size ratio and hence similar properties. One of those shared traits is electronegativity, both lying near

1.5

on the Pauling scale. So aluminium's electronegativity most closely matches that of beryllium.

JEE Main · 2019 · 10 Jan 2019 · Shift 1 · Single correct option

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