2. The vertical columns of the periodic table

3. Groups

4. Anything that has mass and takes up space

5. Matter

6. A type of homogenous mixture formed when one substance dissolves in another

7. solutions

8. When matter changes its property but not it’s chemical nature

9. Physical change

10. Going to a liquid to a solid

11. freezing

12. Basic building block of matter

13. atoms

14. An element that has some characteristics of metals and some characteristics of nonmetals

15. metalloid

16. The amount of space that matter in an object occupies

17. volume

18. Pure substance that cannot be separated into simpler substance by physical or chemical means (consist of one type of atom)

19. Element

20. The electrons in the outer energy level of an atom

21. Valence electrons

22. Going from a solid to a liquid

23. melting

24. The measure of the force of gravity on the mass o an object

25. weight

26. Pure substance composed of two or more different elements joined by a chemical bond

27. compound

28. Not very well mixed

29. heterogeneous

30. Horizontal rows of elements in the periodic table

31. periods

32. How many protons are found in the nucleus of an atom

33. Atomic number

34. When the number of neutrons is more or less than the number of protons

35. isostope

36. Going from a liquid to a gas

37. evaporation

38. The amount of matter in an object; always constant

39. mass

40. A combination of two or more pure substances that are not chemically combined

41. mixtures

42. Well mixed; example- salty water

43. homogeneous

44. Going from a gas to a liquid

45. condensation

46. Changers matter undergoes when it becomes a new or different matter

47. Chemical change

48. The number of protons and neutrons together

49. Atomic weight

50. A model used to draw elements

51. Bohr Model