Arrange the following elements in terms of decreasing electronegativity:
$C a, C l, F r, P, Z n$

C l > P > Z n > C a > F r

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C l > P > Z n > F r > C a

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F r > C a > Z n > P > C l

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Z n > F r > C l > C a > P

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Solution

The correct option is A $C l > P > Z n > C a > F r$
Electronegativity is a chemical property that describes the tendency of an atom or a functional group to attract electrons (or electron density) towards itself. An atom's electronegativity is affected by both its atomic number and the distance at which its valence electrons reside from the charged nucleus.

In general, electronegativity increases on passing from left to right along a period and decreases on descending a group. So upper right corner elements have high electronegativity while lower-left corner has low electronegativity.

$C l > P > Z n > C a > F r$

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Which of the following sets contain only isoelectronic ions?
(i) $Z n^{2 +}, C a^{2 +}, G a^{3 +}, A l^{3 +}$

(ii) $K^{+}, C a^{2 +}, S c^{3 +}, C l^{-}$

(iii) $P^{3 -}, S^{2 -}, C l^{-}, K^{+}$

(iv) $T i^{4 +}, A r, C r^{3 +}, v^{5 +}$

K^{+}, C l^{-}, S^{2 -}, C a^{2 +}

Which of the following option shows the correct symbol and charge of elements present in $C a {C l}_{2}$ ?

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