Chemistry Question and Answer

Important facts about elements

1.Iron is the most abundant transition metal.

2.Bromine (Br) is a non-metal which is liquid at room temperature.

3.Mercury (Hg) is a only metal that is liquid at room temperature.

4.Oxygen (O) is the most abundant element in the earth.

5.Tungsten (W) has the highest melting point (3380 C) among metal.

6.Carbon (C) has highest melting point (4100 C) among non-metal.

7.Aluminium is the most abundant metal.

8.Lithium is lightest among metal.

9.Diamond is hardest  natural substance in earth.

10.Silver is the best conductor of electricity.

11.Astatine is the rarest element in earth's crust.

12.Francium (fr) is  liquid Radioactive element and has highest atomic volume.

13.Nitrogen (N) is the most abundant gas in atmosphere.

14.Florine (F) is the most electronegative element.

15.Caesium (Cs) is the most electropositive element

16.Hydrogen is most abundant element in Universe.

17.Plutonium (Pu) is the most poisonous metal.

18.Chlorine has maximum negative gain enthalpy.

19.Helium has maximum ionisation enthalpy.

20.Technetium (Tc) is the first man-mad element.

21.Iodine (I) is the element which sublimes.

22. Sodium(Na), Potassium(K), Rubidium(Rb), Caesium(Cs) etc..

       are the elements that kept in kerosene oil.