The position of three elements A,B and C in the periodic table are shown below: [5 MARKS]
(a) State whether A is a metal or non-metals.
(b) Will C be larger or smaller in size than B?
(C) State whether C is more reactive or less reactive than A.
(d) Which type of ion, cation, or anion will be formed by element A?
(e) Give two examples of group 17.
The position of three elements A,B and C in the periodic table are shown below: [5 MARKS]
(a) State whether A is a metal or non-metals.
(b) Will C be larger or smaller in size than B?
(C) State whether C is more reactive or less reactive than A.
(d) Which type of ion, cation, or anion will be formed by element A?
(e) Give two examples of group 17.
(a) A is a non-metal because it can gain electrons easily, it has 7 valence electrons and forms negative ions to become stable.
(b) The atomic number of B is less than C, it has less nuclear charge, less force of attraction between protons in the nucleus and valence electrons, hence its size is bigger than C.
(c) A is more reactive due to its small size and has more tendency to accept outside electrons, hence A is more reactive than C.
(d) Anion will be formed due to the tendency to accept electrons.
(e) Chlorine and bromine.
(a) A is a non-metal because it can gain electrons easily, it has 7 valence electrons and forms negative ions to become stable.
(b) The atomic number of B is less than C, it has less nuclear charge, less force of attraction between protons in the nucleus and valence electrons, hence its size is bigger than C.
(c) A is more reactive due to its small size and has more tendency to accept outside electrons, hence A is more reactive than C.
(d) Anion will be formed due to the tendency to accept electrons.
(e) Chlorine and bromine.
