Across
- 1. anything that has mass and takes up space
- 5. building blocks
- 6. whenever a group of atoms are held together
- 7. components that are mixed together but not chemically bonded
- 8. table of elemnts
- 9. a substance composed of two or more metals
Down
- 2. a organizing system of elements by there properties
- 3. heild together with chemical bonds
- 4. molecule
- 6. table salt