Across
- 1. a pure substance that cannot be broken down into other substances, substance made up of one atom
- 5. invisible negatively charged particle that orbits the nucleus of an atom
- 7. Mass of one element
- 11. pure substance formed when at least one metal and one non-metal
- 12. shiny,malleable,ductile metallic and nonmetallic properties
- 13. combination of 2 pure substances
- 18. a reaction that takes place when 2 or more substances react to form a new substance
- 19. chemical combination of 2 or more elements in specific ratio
- 20. The amount of mass given in a volume
- 21. made up 2 elements in the periodic table; their reactivity is not as strong as alkali metals
- 23. slow chemical change that occurs when oxygen in the air reacts with metal
- 24. anything that has a mass and occupies space
- 25. group 17 elements in the periodic table the most reactive non-metals
Down
- 2. group of atoms joined by covenant bonds
- 3. atom that has become electrically charged when it gains or loses energy
- 4. chemical reaction that occurs when oxygen reacts with a substance to form a new substance and give off energy or heat
- 6. energy of charged particles;transferred when electrons travel from place to
- 8. pure substances formed with 2 non metals
- 9. compound that dissolves in water to form a solution with a Hp lower that 7
- 10. 2 or more substances that react with each other to create a new substance
- 14. catalyst involved in chemical reactions in living things
- 15. orbit of electrons around the nucleus of an atom
- 16. an experiment in which all reactants and all products of a chemical reaction are accounted for
- 17. most reactive metals
- 22. the smallest part of an element that representative of that element, contains a Nucleus, Protons and Electrons