Across
- 3. Two or more atoms of the same or different elements that are chemically joined together in a unit.
- 4. A column of elements with similar properties on the periodic table.
- 11. A uniform mixture of two or more substances.
- 12. A neutral particle in the atom's nucleus.
- 13. A positively charged ion.
- 14. A compound that consists of positively and negatively charged ions.
- 16. A mixture in which you can distinguish between different types of matter.
- 19. A pure substance that cannot be broken down into a simpler chemical substance by physical or chemical means.
- 20. The temperature at which a substance changes quickly from a liquid to a gas.
- 21. An element that has properties of both metals and non-metals.
Down
- 1. Notation that indicates the type and number of atoms in a pure substance.
- 2. The degree to which a liquid resists flow.
- 5. The smallest unit of an element.
- 6. A row on the periodic table.
- 7. A characteristic of a substance that can be determined without changing its composition.
- 8. A pure substance composed of two or more different elements that are chemically joined.
- 9. A substance that is made up of only one type of particle.
- 10. A particle that has either a positive or a negative charge.
- 15. A substance that is made up of at least two different types of particles.
- 17. A characteristic of a substance that is determined by changing its composition to produce one or more new substances.
- 18. A negatively charged ion.