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wore
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calculated for money in cosculat
and cost
cost of twing. find
of there
any correlatoon belwoor
them supposing that the money
Corculation affects the cost in leving
Index of money in concokalson/ 110 120 125 128 132140 150
Index of cost of leiana 105 108 110 112 108 130 131
Ang
Answers
Answer:
Explanation:
The d-block elements of the periodic table contains elements from group 3 to 12 and are
known as transition elements. In general, the electronic configuration of these elements is
(n-1)d -1°nsº-2. The d-orbitals of the penultimate energy level in their atoms receive
electrons giving rise to three rows of transition metals, i.e. 3d, 4d, 5d series. However zinc,
cadmium and mercury are not regarded as transition elements. Transition elements exhibit
certain characteristic properties like variable oxidation states, complex formation, formation
of coloured ions, etc. Transition metals are hard except zinc, cadmium and mercury.
a) Why zinc, cadmium and mercury are non-transition elements?
b) Why is Cu(II) ion coloured while Zn(II) ion is colourless in aqueous solution? c) Total number of
electrons in d and s orbitals in a transition element is 6. How are the electrons arranged in d and s
orbitals? (3)