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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