A Name and give the formula of: (1) compound A
(ii) compound B.
b Write balanced chemical equations for the formation
of both compounds A and B.
Name and give the symbol/formula for the ions
present in limewater.
d Describe with the aid of a balanced chemical
equation what happens if carbon dioxide is bubbled
through limewater until there is no further change.

i think it's c. i'm not sure but i think so.

pie chart because it is in percents ( % )

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.

the answers are

c and c