Which of the following is NOT a physical or c | vedclass

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(B) Interstitial compounds are formed when small atoms like $H, C, N$ are trapped inside the crystal lattice of transition metals.Their key characteri

Vedclass · Accepted Answer

They are very soft and ionic in nature.

Vedclass · Answer

(B) Interstitial compounds are formed when small atoms like $H, C, N$ are trapped inside the crystal lattice of transition metals.Their key characteristics include:$1$. They have high melting points, higher than those of pure metals.$2$. They are very hard (some approach diamond in hardness).$3$. They retain metallic conductivity.$4$. They are chemically inert and usually non-stoichiometric.Since they are extremely hard and possess metallic properties, the statement that they are 'very soft and ionic' is incorrect. Therefore, option $B$ is the correct answer.

Atom/Ion	Electronic Configuration
$(1) \ Cu$	$(A) 1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 3d^{10}$
$(2) \ Cu^{2+}$	$(B) 1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 3d^{10}, 4s^2$
$(3) \ Zn^{2+}$	$(C) 1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 3d^{10}, 4s^1$
$(4) \ Cr^{3+}$	$(D) 1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 3d^9$
	$(E) 1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 3d^3$

Which of the following is $NOT$ a physical or chemical characteristic of interstitial compounds?

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