Question

a) Name two elements of group 13.
(b) Name most electronegative element in periodic table. Write its atomic number.
(c) Give limitations of Dobereiner’s law of triads.
(d)Why do ionic compounds not conduct electricity in solid state?
(e) Name the chief ore of iron. Give its formula.

Answer 1

a. boron , aluminium are the two elements of the group 13
b.Fluorine . it's atomic number is 9
e.magnatite - Fe3O4
haemitite- Fe2O3
are the chief ores of iron
c and danswer is not the photograph.