Across
- 5. the mass of one atom in an element calculated using the protons and neutrons
- 8. Things that speed up the chemical reaction rate
- 9. neutral particle in the nucleus of an atom
- 10. the number of protons in one atom of an element
- 12. A compound made up of 2 non-metals
- 14. a change where an entirely new substance is created with different properties from the original combinations
- 15. A physical characteristic of a substance in which it can be pounded or rolled into sheets
- 17. The vertical columns of the periodic table also known as families
- 19. A property that describes the appearance and composition of a substance
- 21. An experiment where one or more products of a chemical reaction can escape
- 23. An experiment in which all reactants and product in a chemical reaction are accounted for
- 24. characteristics used to describe a substance
- 25. A homogeneous mixture
Down
- 1. group 17 of the periodic table
- 2. the substance that reacts to another substance to create a product
- 3. a positivly charged centre of an atom consisting of protons and neutrons
- 4. An invisible negatively charged particle that orbits around the nucleus of an atom
- 6. the most reactive group of the metals on the periodic table
- 7. A substance that strongly resists the flow of electricity
- 11. Heterogeneous Mixtures
- 13. A element with both metal and nonmetal properties
- 16. Pure substances merged as a result of their opposite charges
- 18. a new substance produced in a chemical reaction between reactants
- 20. An atom or a group of atoms that become electrically charged because it has lost or gained electrons
- 22. a pure substance made up of only one type of atom