Across
- 2. the horizontal rows of the periodic table
- 3. an element that readily forms positive ions and has metallic bonds
- 5. an element whose properties are intermediate between those metals and solid metals
- 7. able to be hammered or pressed permanently out of shape without breaking
- 8. levels the fixed amount of energy that a system described by quantum mechanics
- 9. able to be deformed without losing toughness
- 11. an element or substance that is not a metal
- 13. the membrane-enclosed organelle within a cell that contains the chromosomes
- 15. the vertical columns on the periodic table that have similar chemical properties
- 16. Cloud the system of electrons surrounding the nucleus of an atom
Down
- 1. a stable subatomic particle occurring in all atomic nuclei with a positive electric charge
- 4. Electrons a negatively charged particle located in the outermost shell of an atom
- 6. a stable subatomic particle with a charge of negative electricity
- 10. a subatomic particle of about the same mass as a proton but without an electric charge
- 12. a particle of matter that uniquely defines a chemical element
- 14. a gentle sheen or soft glow, especially that of a partly reflective surface
