Questions

Though the outer electronic configuration is same for the elements in 1B or 11th group Cu, Ag, & Au, gold and silver are less reactive than copper because

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By Expert Faculty of Sri Chaitanya

Cu has less ionization energy than silver and gold

The higher effective nuclear charge due to poor shielding effect of inner d-electrons in Ag, and d & f electrons in Au make them more difficult to oxidize Ag & Au

The valence electron orbital energies of most common Lewis bases match the valance orbitals of Cu and its cations more closely and would interact with them more favorably to form products.

Heat of atomization of Ag and Au are more than Cu

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detailed solution

Correct option is B

Enthalpies of atomization of Cu = 339, Ag = 285, and Au = 368 kJ/mol. I1 of Cu, Ag and Au are 7.726, 7.576 and 9.225 respectively.

Similar Questions

This section contains questions each with two columns-I and II. Match the items given in column I with that in column II.

	Column I		Column II
a.	Ni	p.	Elements having same number of unpaired electron in their dispositive in column I
b.	Na	q.	At least 13 electrons are having magnetic quantum number 'zero'
c.	Mn	r.	Atom is paramagnetic
d.	Pd	s.	Element is not transition element
		t.	Element having pseudo inert gas configuration in its dispositive cation