Across
- 2. chlorine
- 5. combination of pure substances
- 6. substance that reacts with another substances in a chemical reaction to create new substances with different properties
- 8. shell orbit of electrons around the nucleus of an atom
- 9. a chemical combination of two or more elements in a specific ratio
- 14. table a table in which the elements are organized by their physical and chemical properties
- 15. cloudy mixture in which tiny particles of one substance are held within another and the particles can be separated out
- 16. neutral particle in the nucleus of an atom
- 18. number number of protons in the nucleus of one atom of an element
- 19. group 17 elements in the perodic table,the most reactive not metals
- 21. metals group 1 elements in the peroidic table,not including hydrogeon the most reactive of the metals
Down
- 1. a pure substance that cannot be broken down into other substances,made up of only one type of atom
- 3. something that has mass and occupies space
- 4. group of atoms joined by covalent bonds
- 7. homogenous mixture mixture of two or more pure substances that looks like one substance
- 9. reaction a reaction that takes place when to or more substances react to form a new substance
- 10. change in the appearance or state of a substance that does not change the composition
- 11. compound pure substance formed when non-metals combine
- 12. positively charged particle in the nucleus of an atom
- 13. cloudy mixture in which tiny particles of one substance are held within another and particles cannot be seperatedout from other substances
- 17. compound pure substance formed when at least one metal and one non metal combine
- 18. compound that dissolves in water to form a solution with a ph lower than 7
- 20. gases group 18 elements in the periodic table,the most stable and interactive elements