Across
- 5. A chart of the elements showing the repeating pattern of their properties
- 8. Particles that have a positive charge, found in the nucleus
- 9. A one-or-two letter representation of an element
- 11. The mass of the reactants must equal the mass of the products
- 15. Two or more molecules interact to form different molecules
- 16. The amount of matter a substance has
- 17. Center of an atom
- 18. Changes depending on how much gravity is present
Down
- 1. The average mass of one atom of an element
- 2. Elements in the same vertical column of the periodic table. Also called "family"
- 3. Particles that have no charge, and are neutral. Found in nucleus
- 4. A horizontal row of elements in the periodic table
- 5. What's around after a chemical reaction takes place
- 6. A unit used to measure the mass of particles in atoms; a proton or neutron has a mass of one amu
- 7. Particles that have a negative charge. Found outside nucleus
- 10. The number of protons in the nucleus of an atom
- 12. The substances that are around at the beginning of a chemical reaction
- 13. The smallest componet of an element, the building blocks of matter
- 14. "Not divisible". Originated from Greek philosopher, Democritus