Chemistry

4. Elements on the left-hand side of the Periodic Table
9. A substance that cannot be separated into simpler components by physical methods
11. a mixture of uniform composition and in which all components are in the same phase
12. The process during which a solid changes directly into a gas or vapour without passing through an intermediate liquid phase

1. Very reactive metals
2. The temperature at which a solid, given sufficient heat, becomes a liquid
3. a mixture of non-uniform composition and of which the components can be easily identified
5. Attract each other
6. Bond formed through the transfer of electrons resulting in ions
7. Pure substance consisting of two or more different elements
8. Most electronegative element
10. The process during which a solid changes to a liquid by the application of heat