modern BIOLOGY
name:
block:
Chemistry Review
score:
Chemistry
LT #4a
1. Define matter.
2 pts
3 pts
3 pts
6.
Which particles determine the atomic mass of an
atom?
LT #4b
2. What is the relationship between an atom and an
element?
7.
What are the units used for the mass of these
particles?
3.
An atom is composed of two basic parts. These are
the center, or the __________, and the outer, or
_____________.
8.
Why is the combined mass of the electrons in an
atom considered to be negligible?
9.
4.
Where are the protons and neutrons located in all
atoms?
If an atom has six protons, how many electrons does
it have?
5.
What are the symbols for each of the subatomic
particles?
2 pts
10. The atomic number is equal to what?
11. Draw an electron arc diagram for an atom, ion and isotope of this element.
atom
ion
isotope
12. For the following family names (columns), write below them the correct charge formed when these elements ionize.
I
II
III
IV
V
VI
VII
VIII
H
Be
Al
C
N
O
Cl
He
For questions 13 - 19, you will need to use a periodic table.
Name an element that…
13. …is stable as an atom.
17. …has the fewest number of energy levels and the
most number of protons in its row and will ionize to
become stable.
14. …forms a -3 ion.
15. …has its outermost electrons in the second energy
level.
16. …has the most number of energy levels and the
fewest number of protons in its row.
3 pts
18. All of the elements in the same family (column) have
the same number of _________________.
19. All of the elements in the same row have the same
number of ___________________.
20. Carbon-12 and Carbon-14 are isotopes of carbon. What does this mean?
They have the same __________________, but different __________________and therefore, different ______.
Mrs. Loyd 
cschmittloyd@waukeeschools.org
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LT #4c
2 pts 21. What is the difference between an atom of sodium and an ion of sodium?
22. How many electrons will one carbon atom share?
23. How many bonds can one hydrogen atom form?
24. How many bonds can one oxygen atom form?
25. How many times more protons does Fluorine have compared to Lithium?
26. Explain why electrons stay around any given nucleus?
27. Which element, F or Li, has a stronger pull on electrons?
LT #4d
28. Define: ionic bond:
29. Draw an electron arc diagram (or electron dot diagram)
to illustrate an ionic bond.
30. Define: covalent bond:
31. Draw an electron arc diagram to illustrate a covalent
bond.
32. What does the double line between two atoms mean,
such as C=C?
33. Which element is found in all organic compounds, and all living organisms? (This is why life on Earth is considered to be
______________ - based.)
LT #4e
Use the following equation to answer the questions 34 - 43.
C5H12 + 8 O2  5 CO2 + 6 H2O
34. How many atoms are in a carbon dioxide molecule?
(CO2)
41. How many atoms are in the pentane?
35. How many atoms of oxygen are in the amount of
carbon dioxide shown to the right of the arrow?
42. How many molecules are shown on the left?
43. Is this equation balanced? Yes or No
36. How many total molecules are included in the
equation?
44. Why do chemical reactions occur in the cell?
37. How many different kinds of elements?
38. How many different kinds of molecules are included in
the equation?
39. Are there an equal number of hydrogen atoms on the
left as on the right?
40. What is the ratio of pentane (C5H12) to oxygen (O2) on
the left?
Mrs. Loyd 
cschmittloyd@waukeeschools.org
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7/12/2016
http://loydbiology.weebly.com