Across
- 2. mass unit measure of atomic mass
- 4. vertical column of elements in the periodic table
- 5. reaction a reaction that takes place when two or more substances react to form new substances
- 8. element that has both metallic and nonmetallic properties
- 9. metals group 1 elements in the periodic table ,not including hydrogen
- 10. cloudy mixture in which tiny particles of one substance are held within another
- 12. chemical reaction that occurs when oxygen reacts with a substance to form a new substance and give off energy
- 13. change change in appearance or state of a substance that does not change the composition
- 15. shells orbit of electrons around the nucleus of an atom
- 16. positively charged particle in the nucleus of an atom
- 17. vertical of elements in the periodic table
Down
- 1. horizontal row of elements in the periodic table
- 3. chemical combination of two or more elements in a specific ratio
- 6. metals group 2 elements in the elements periodic table
- 7. cloudy mixture in which tiny particles of one substance are held within another and particles cannot be separated out from out from the other substance
- 11. slow chemical change that occurs when oxygen in the air reacts with a metal
- 14. neutral particle in the nucleus of an atom