Which of the following trends regarding atomic radius is true?

K>Ca>Sc>Ti

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Na<Mg<Al<Si

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Ca<Ti<Cr<Co

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Cr<Fe<Ni<Zn

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Solution

The correct option is A
K>Ca>Sc>Ti

Atomic radius decreases along the period (from left to right). Hence the correct order is K>Ca>Sc>Ti

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Similar questions

(a) N i, C u, Z n

(b) H^{+}, H, H^{-}

(c) C r, V, T i, S c

(d) I^{+}, I, I^{-}

(e) C u, A g, A u

(f) B, B e, A l, M g

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

Z n = 30

S c = 21

T i = 22

C r = 24

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