Question

Match each of the following elements on the right with its description on the left.

Answer 1

(A) Bromine, $B{r}_2$ is a reddish brown heavy (density 3.2) liquid (boiling point ${58}^{o}C$).
(B) Hydrogen $H_2$ is colourless, odourless and tasteless gas that burns in oxygen gas.
(C) Calcium (Ca) being an alkaline earth is a reactive metal that attacks water.
$Ca+H_{2}O\to Ca(OH{)}_2+H_2$
(D) Argon (Ar) is a totally inert gas and has little tendency for reaction. It is highly stable due to completed octet.
(E) Gold (Au) is a shiny metal that is used in jewellery. It is a transition element and belongs to sixth period and IB group.
Silver is another transition metal is also used in jewellery.