Across
- 2. Likely to give off nuclear radiation
- 4. Shows pH by a colour change
- 5. Particles inside an atom
- 7. Random motion caused by tiny particles
- 9. Neutral particle in the nucleus
- 12. Substance with different atoms in it
- 15. Version of an atom with a certain mass
- 16. How to find out whether hydrogen is present
- 17. Radiation consisting of 2 protons and 2 neutrons
- 18. Groups 3-12 on the Periodic Table
- 19. Chemicals coming out
- 21. Column indicating number of valence electrons
- 23. Being sour
- 24. When a property remains the same
- 29. Charged atom
- 30. Negative ion containing hydrogen and oxygen
- 31. Acid or base that always produces ions
- 32. Likely to undergo decay
- 36. Opposite of acidity
- 37. Positive particle in the nucleus
- 40. Central part of an atom
- 43. Has a pH > 7
- 44. Acid or base that sometimes produces ions
- 47. Tends to accept electrons
- 49. Can be bent
- 50. Level where electrons can be
- 51. Negative particle outside the nucleus
- 52. Used to test for carbon dioxide
- 54. Takes in heat
- 56. Summary of the substances in a reaction
- 57. Zone where electrons may occur
- 58. Chemicals going in
- 59. Measure of how acidic something is
- 61. The time taken for 50% to decay
- 62. Property that responds to electric fields
- 64. Reaction where substance does not change
- 65. A type of nuclear decay that is an electromagnetic ray
Down
- 1. How much radiation knocks electrons off atoms
- 3. Heat needed for a reaction to begin
- 6. How much radiation travels through materials
- 8. Organised display of elements
- 10. Arrangement of electrons
- 11. Has a pH < 7
- 13. Allows flow of electricity
- 14. Chemical formed in a neutralisation reaction
- 20. Allows energy only to leave
- 22. No movement of matter or energy from the system
- 25. Allows matter to leave
- 26. Smallest particle of an element
- 27. Reaction between acid and base
- 28. Chemical with a defined makeup of atoms
- 33. Radiation that can be an electron or positron
- 34. May behave like a metal and a nonmetal
- 35. Connection between atoms
- 37. Solid coming out of a liquid
- 38. Neither positive nor negative
- 39. Different arrangement of an element
- 41. Mixture used to measure pH in a rainbow
- 42. The number of atoms is the same on both sides
- 45. Atoms bonded together in a package
- 46. Substance with one kind of atom
- 48. Row indicating number of shells
- 53. Gives off heat
- 55. Does not undergo decay
- 60. Tends to give electrons
- 63. Reaction where substances change