Across
- 4. Smallest unit of matter
- 5. ability to be hammered into thin sheets
- 6. ability to burn or ignite
- 7. A substance that consists of atoms that have the same number of protons
- 8. The first element of the periodic table
- 10. have a negative charge and a mass of zero
- 11. A substance composed of two or more elements
Down
- 1. center of the atom
- 2. the 98 element of the periodic table
- 3. ability to dissolve or be dissolved
- 9. the 54 element of the periodic table