Question

Who can guess the elements by given clues:
1) (i) Element found in group 3,
(ii) Greenish gas which is denser than air,
(iii)Will displace iodine from sodium iodide,
(iv)Used in swimming pools to kill germs.
2) (i) Element which burns in air with yellow flame,
(ii) Soft metal easily cut with a knife,
(iii)Burns in chlorine to form white smoke,
(iv)Atom three electron shells
3) (i) Element is an unreactive colourless gas,
(ii) Its atom contains the same number of protons,neutrons and electrons.
(iii) used in balloons,
(iv)has a full outermost shell

Answer 1

4) (i) useful transition metals,pinkish in colour,
(ii)forms compounds with variable valency,
(iii)good conductor of heat,
(iv) forms a blue coloured ion in solution.

Answer 2

1 is chlorine

Answer 3

2 is gold

Answer 4

3 is helium

Answer 5

4 is copper

Answer 6

hope this helps :D

Answer 7

3 4 correct melissa

Answer 8

1 2 also correct

Answer 9

yay! ^_^

Answer 10

cool!!!!

Answer 11

interested in organic chem

Answer 12

:D

Answer 13

thankyou @MelissaHolmes

Answer 14

you're very welcome :D