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