Amalgam is an alloy of mercury with other metals. Therefore, mercury is an important component of amalgam.it is usually used to fill teeth cavities. Thus, (c) is the correct option. 5. Identify the incorrect statement among the following (CBSE AIPMT 2007) (a) There is a decrease in the radii of the atoms or ions as one proceeds from La to Lu. (b)Lanthanoid contraction is the accumulation of successive shrinkages. (c)As a result of lanthanoid contraction, the properties of 4d-series of the transition elements have no similarities with the 5d-series of elements. (d)Shielding power of 4f elect
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