Across
- 2. table of all existing elements
- 4. a pure substance
- 6. electrons less than protons
- 9. waves that generate heat
- 11. element Au
- 12. smallest portion of matter
- 13. element Kr
- 16. after yellow
- 21. product of gas, giving off heat and light
- 22. neutral part of an atom
- 24. letters representing an element
- 25. rate of vibration
- 27. negatively charged ion
- 28. used to calculate
- 32. positive ion formed when metal element loses electrons
- 33. weight of an atom
- 36. process of energy being released
- 37. before orange
- 38. amount of energy exerted
- 39. any perceivable light
- 42. after blue
Down
- 1. difference between waves
- 3. higher energy than ground state
- 5. infinite scale of colors
- 7. particle of light
- 8. radiation visible to human eye
- 10. positively charged ion
- 14. before violet
- 15. element He
- 17. magnet with electrical current
- 18. negative part of an atom
- 19. element Fe
- 20. two similar elements with different mass
- 23. no positive or negative charge
- 24. digit on the top left of an element
- 26. element Co
- 28. fewer or more electrons than protons
- 29. size of sample
- 30. element Sn
- 31. negative part of an atom
- 34. same number of protons and electrons
- 35. before green
- 40. after red
- 41. positive part of an atom