Science vocab

2. The smallest compound of an element which can normally exist by itself and still have that properties of that element.
4. An ion with a positive electric charge. An atom which has lost one or more electrons.
8. A solid which forms and settles into a solution.
9. compound A compound made up of ions.
10. The substances that change as a result of a chemical change.
11. A substance containing two or more elements which have been chemically combined.
12. compound A compound made up of molecules; the molecules consist of atoms that are linked by sharing electrons.
15. A charged particle;an atom or group of atoms which has lost or gained electrons.

1. A way of describing the composition of a substance,using symbols and numbers.
3. reaction A reaction that absorbs energy in the from of heat
5. The substances formed as a result of a chemical change.
6. energy The energy needed for a reaction to occur.
7. reaction An energy that releases energy in the form of heat.
13. An ion with a negative electric charge. An atom which has gained one or more electrons.
14. The way chemists write down chemical reactions,using the symbols and formula of the chemicals taking part.