[Maximum number: 1]

Caesium, Cs, is an element in Group I of the Periodic Table.
When caesium reacts it forms a positive ion, $\mathrm{Cs}^{+}$ .
How is a caesium ion formed?

A caesium atom gains a proton.

A caesium atom gains an electron.

A caesium atom loses an electron.

A caesium atom shares an electron.

[Maximum number: 1]

Metal X reacts with non-metal Y to form an ionic compound with the formula $\mathrm{X}_{2} \mathrm{Y}$ . Which statements are correct?

1 X is in Group I of the Periodic Table.
2 X is in Group II of the Periodic Table.
3 Y is in Group VI of the Periodic Table.
4 Y is in Group VII of the Periodic Table.

1 and 3

1 and 4

2 and 3

2 and 4