Across
- 2. A bond is formed
- 4. an ion that gains an electron
- 6. A reaction that gives off heat
- 9. an ion that loses an electron
- 10. sharing electrons in a bond
- 14. how heavy an atom is
- 16. groups on periodic table
- 18. decay that releases purely energy
- 19. A reaction where one element is replaced
- 22. absorbs heat
- 24. rows on periodic table
- 26. new substance is formed during reaction
- 28. a substance that can be split
- 29. outside of a nucleus where electrons are
- 31. decay that releases electron+neutron
- 35. liquid to gas
- 36. power in a battery
- 40. solid to liquid
- 43. no substance is formed during reaction
- 44. an atom that has lost or gained electron
- 45. a guess based on evidence
- 46. a bond with 2+ atoms
- 47. decay that releases positron+neutron
- 49. releases heat
- 50. a variable that is not changed
Down
- 1. Combining 2 small nuclei
- 3. a particle with a neutral charge
- 5. a statement based on senses
- 7. center of an atom
- 8. liquid to solid
- 11. decay that releases 2 protons+2 neutrons
- 12. extremely fast moving particles
- 13. electrons in the outer shell
- 15. a particle on the outside of the nucleus
- 17. bond electrons are taken or given
- 20. result of a reaction
- 21. the variable measured in an experiment
- 23. If an atom has 5 electrons, what does it do?
- 25. A bond is broken
- 27. protons+electrons
- 30. starting material that goes under change
- 32. 0-6
- 33. a particle with a positive charge
- 34. 7 on the PH scale
- 37. scale 0-14
- 38. Splitting a heavy nucleus
- 39. gas to liquid
- 41. 8-14
- 42. if an atom has 2 electrons, what does it do?
- 48. basic unit