Across
- 2. second group od elements on the periodic table
- 3. how much 1 proton or neutron weighs
- 6. a theory of matter and energy based on the concept of quanta, especially quantum mechanics.
- 9. a substance made by mixing others
- 10. =protons+electrons
- 11. type of charge in electron
- 13. not reactive
- 15. levels for electrons
- 16. uniquely defines an element
- 17. positive charge, in the nucleus
- 19. a column in the peridoic table (up and down)
- 21. emitting energy created by breaking down particles
- 23. two elements chemically joined
- 24. versions of an atom with different amounts of neutrons
- 25. helium, neon, argon, krypton, xenon, radon, and oganesson
- 26. outer most electrons
- 29. the quality or character of being periodic; the tendency to recur at intervals.
- 31. no charge, in the nucleus
- 32. fluorine, chlorine, bromine, iodine, and astatine
- 33. negative charge, outside the nucleus
Down
- 1. first group of elements, extremely reactive
- 4. malleable, conductive elements
- 5. arranged table containing all elements
- 7. substances that cannot made to be simpler substances
- 8. amount of protons or electrons
- 12. boron, silicon, germanium, arsenic, etc.
- 14. where electrons reside
- 18. elements from groups 3 to 13
- 20. not metal
- 22. amount of charge in a single proton or electron
- 27. contains the protons and neutrons
- 28. a row in the periodic table (left to right)
- 30. an atom with a charge