Attempt either (a) or (b) : (a) (i) Write one example each of one metal that is so soft that it can be cut…
Attempt either (a) or (b) :
(a) (i) Write one example each of one metal that is so soft that it can be cut with a knife, and one non-metal that is a good conductor of electricity.
(ii) Using the electronic configuration, explain how Mg atom combines with oxygen to form magnesium oxide by transfer of electrons. [Atomic number : Mg = 12, O = 8]
Solution
(a) (i)
• Lithium (Li) / Sodium (Na) / Potassium (K) (anyone)
• Graphite
(ii)
OR
(b)(i) It is easier to obtain metal from its metal oxide / It is easier to
reduce metal oxide to metal.
(ii) Aluminium oxide can react with both acids as well as bases to
form salt and water.
/
(iii) As they are highly reactive metals so exist in combined state.