Across
- 2. equation, symbolic representation of a chemical reaction in the form of symbols and chemical formulas
- 5. the smallest unit of an element that has all the properties of the element.
- 6. looks different throughout
- 8. mass, a mass of an element that is equal to the number of protons and neutrons in the nucleus of one atom of the element.
- 9. a particle that has a negative charge and orbits the nucleus of an atom.
- 10. cloud, the region surrounding the nucleus of an atom where the electrons are located.
- 11. composed of only one type of atom which cannot be broken down into simpler substances by normal chemical means.
- 13. small number written below and to the right of a chemical symbol in a chemical formula
- 15. a substance that conducts heat and electricity.
- 17. positively charged subatomic particle located in the nucleus
Down
- 1. type of matter that forms when two or more substances are combined but do not join together chemically.
- 3. an element that has some properties of a metal and some properties of a nonmetal.
- 4. looks the same throughout
- 7. an element that does not conduct electricity or heat and is usually a gas at room temperature.
- 8. number, the number of protons and element has in its nucleus
- 12. large number in front of a chemical formula
- 14. two or more elements chemically combined
- 16. a particle that has no charge and is found in the nucleus of an atom.