Review Worksheet



Review Worksheet- Answer Key

1. What is matter?

_____Anything that has mass and volume___________________

2. What is a measure of how much matter an object is made of?

_____Mass________________________________________________

3. What is the smallest basic unit of matter?

_____Atom________________________________________________

4. What are the 4 states of matter?

_____Solid, Liquid, Gas, Plasma______________________

5. What does the Law of Conservation of Matter state?

_____matter can neither be created nor destroyed_________

6. If a solid becomes a liquid you must add energy. What is this process called?__Melting point_____________________________________

7. If a liquid becomes a gas you must add energy. What is this process called?___evaporation______________________________________

8. If a gas becomes a liquid you must remove energy. What is this process called?___condensation______________________________

9. If a liquid becomes a solid you must remove energy. What is this process called?___freezing point_____________________________

10. Describe the motion and arrangement of molecules in a liquid.

_____definite volume but no definite shape, particles are close together but can slide freely past on another

11. Describe the motion and arrangement of molecules in a solid.

____definite shape and volume, particles are close together, they are fixed in place but can vibrate_____

12. Describe the motion and arrangement of molecules in a gas.

___no fixed volume or shape, particles are farther apart and move freely in any direction

13. What is a molecule?

___group of atoms that are held together by covalent bonds so that they move as a single unit

14. What is an element?

___a substance that cannot be broken into a simpler substance by ordinary chemical changes, consists of atoms of only one type__________

15. What is a compound?

____substance made up of two or more different types of atoms bonded together_

16. What is a mixture?

___combination of two or more substances that do not combine chemically but remain the same individual substances

17. How are compounds separated?

____chemical means________________________________

18. How are mixtures separated?

_mixtures can be separated by physical means_____________________

19. What two types of substances are considered "Pure substances?"

___1) elements, because it contains only a single type of atom or 2) a single combination of atoms that are bonded together______________

20. A compound can have ___different_________properties from the individual elements that make it up. (Hint: think if the elements that combine to make water)

21. What are the 3 sub-atomic particles in an atom?

___proton, neutron, electron___________________

22. What charge does each of the 3 sub-atomic particles carry?

___proton- positive, neutron-no charge, electron-negative______________

23. What is the center of an atom?

___nucleus_______________________________________________

24. What 2 sub-atomic particles are in the center of an atom?

__proton and neutron________________________________________

25. What sub-atomic particle is in a cloud traveling outside the center of an atom?____electron______________________________________

26. An atom is mostly empty _space___________________________.

27. What is the Periodic Table?

__a table of the elements, arranged by atomic number, that shows the patterns in their properties____

28. What is the atomic number of an element?

____the number of protons__________________________________

29. What is the atomic mass number?

___the total number of protons and neutrons in an atom’s nucleus

30. What is a group on the periodic table?

____a column of elements with similar properties_______

31. Why are elements arranged in a group?

_____they have similar physical properties__________

32. What is a period?

______a row on the periodic table, the elements in periods have the same number of electron shells

33. What happens to the atomic numbers in a period as you move from left to right on the periodic table?

____they increase by one___________________________

34. What is a nonmetal?

___an element that is not a metal and has properties generally opposite to those of a metal

35. Where are nonmetals found on the periodic table?

_____top right corner, to the right of the metalloids_

36. What is a metal?

____an element that tends to be shiny, easily shaped, and a good conductor of electricity and heat_______

37. Where are metals found on the periodic table?

__left of metalloids _______________________________

38. What is a metalliod?

____element that has properties of both metals and nonmetals_

39. Where are metalliods found on the periodic table?

_____staircase between metal and nonmetals_______________

40. What are the capitalization rules for the elemental symbols?

_____the first letter is always uppercase and if there is a second letter it is lowercase__

41. Where do you find the noble gases on the periodic table and what do they have in common?

___Group 8; 8 valence electrons, not reactive w/ other elements

42. Where do you find the alkali metals on the periodic table and what do they have in common?

___Group 1, 1 valence electron in outer shell, very reactive___

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