Astatine is an element in Group VII of the Periodic Table. Compared with iodine, astatine is ......1...... reactive. The melting point of astatine is ......2...... the melting point of iodine. Compared with bromine, astatine is ......3...... in colour. Which words should go in gaps 1, 2 and 3?
- Aless; higher; darker
- Bless; lower; lighter
- Cmore; higher; darker
- Dmore; lower; lighter