Across
- 1. The smallest unit of an element.
- 4. The most basic substances in our world and they combine together to make all of the matter around us.
- 7. _______ table
- 8. Only formed when atoms of two or more different elements are joined together to form a substance.
- 9. atoms of different number of neutrons but same number of protons
Down
- 2. form when two or more atoms are chemically bonded to each other and thehe atoms that form a them can be either from the same element or different elements.
- 3. neutral particle in an atom
- 5. negative particle in an atom
- 6. core of an atom
- 7. positively charged particle in an atom