Name:_______________________________________________________________Period :_______ Date:__________
Chemistry 1 Semester Study Guide
Unit 2
1. Describe your understanding of these vocabulary words. Use pictures to model the terms.
a. Element:
b. Compound:
c. Mixture
d. Pure substance
2. Compare and contrast the concepts of physical change and a chemical reaction?
3. If you were given an unknown solid describe how you could determine if it is a metal or a non metal. Make
sure to explain what the results of a test would be if your material was a metal and what the results would
be if the material was a non-metal.
4. Sketch a phase change graph for the heating of methylene chloride from -110 °C to 53 °C. The boiling point
of this material is 42.6 °C and the melting point is -73.7 °C.
5. The picture below shows the three most familiar States of Matter.
m
e
l
t
a. Under each drawing, write the name for that state.
b. Draw what four atoms (little balls) are doing in each state, within the container. Show the motion and
spacing of the atoms.
c. Label each arrow in the diagram with the name of the process that changes the state.
6. How would you separate mixtures of the following?
a. Salt dissolved in water
b. Sand and iron filings
c. Salt and sand
7. Which elements do the following symbols represent?
Al
Br
N
Ca
8. What is the chemical symbol used for each of these elements?
Magnesium
Carbon
Silver
Hydrogen
9. What happens to the temperature of water when it is coming to a boil?
10. What happens to the temperature of water after it has started boiling?
He
Li
Fluorine
Unit 3
11.
d.
e.
f.
g.
h.
i.
What metric unit would you use to measure the following?
The length of an unsharpened pencil
The volume of a can of soda
The mass of a kangaroo
The temperature of this room
The length of the school
The mass of an eraser
12. Make the following measurements. Use the correct unit and significant figures.
What is the length
of this line?
What is the mass?
What is the
temperature?
What is the mass?
2
0
°1
C
0
°
0C
°
13.CUsing the correct measurements. Show your calculations in the density of the egg shaped object. The mass
of the object is 21.23 g.
30
30
20
20
1
0
m
L
1
0
m
L
10
10
14. If you measure the mass and volume of three different samples of the same material and you graph mass on
the y axis and volume on the x axis, what will the slope of the graph tell you? How do you know?
15. If an object has a volume of 2.6 mL and a mass of 5.32 g, what is the density of the object? Will it float or
sink in water?
16. Use unit analysis to convert the following
a. How many cm are in 23.4 meters?
b. How many seconds are in 2.50 hours?
17. Put the following into scientific notation:
a. 1982000
b. 0.00726
Unit 4
18. Fill in the following table:
Name
Proton
Location
Symbol
p+
Neutron
8. Take the
following out of
scientific notation:
a. 7.89 x 10-3
b. 2.983 x
5
10
Mass
Charge
1 a.m.u.
(atomic mass unit)
Electron
Electron shells
(orbitals)
19. For a typical atom of Oxygen (O)
a. List the number of ______ protons _______neutrons ________electrons
b. Draw a Bohr model of the atom
c. Draw the orbital diagram of the atom
1-
d. What is the electron configuration for the atom (oxygen)
i. Standard Version:
ii. Noble Gas Version: (short cut)
20. For a typical atom of Potassium (K)
a. List the number of ______ protons _______neutrons ________electrons
b. Draw a Bohr model of the atom
c. Draw the orbital diagram of the atom
d. What is the electron configuration for the atom
iii. Standard Version:
iv. Noble Gas Version:
21. Using picture and written descriptions, explain how an atoms electron can be excited, and how that
electron can emit different colors when the energy is released.
22. How many atoms are in 2.3 moles of boron?
23. How many moles are in 4.32x1024 atoms of chlorine?
24. How many moles are in 3.57 grams of CO2?
25. What is the mass of 5.13 moles of H2O?
26. How many atoms are in 4.21 grams of Iron?
27. What is the mass of 4.21x1022 atoms of glucose (C6H12O6)?
28. Given the following isotope symbol, describe how many protons, neutrons and electrons are in those
atoms.
29. Compare and contrast isotopes carbon-12, carbon-13, and carbon-14. What do they have in common?
What is different?
30. Draw the Bohr Models for carbon-12, carbon-13, and carbon-14.
31. Magnesium has three naturally occurring isotopes. 78.70% of Magnesium atoms exist as Magnesium-24,
10.03% exist as Magnesium-25, and 11.17% exist as Magnesium-26. What is the average atomic mass of
Magnesium?
32. Uranium 238 decays into another element via alpha decay. Write the equation below.
33. An element decays into Lead-208 via beta decay. Write the question below.
34. Which of the element families include elements that don’t react well with any other elements?
35. Which family do each of the following elements fall into?
a. Cl ____________________________
b. Li ____________________________
c. Ca ____________________________
d. Ag ____________________________
e. Eu ____________________________
f. Kr ____________________________
36. How many valence electrons do each of the following elements have?
a. Cl ____________________________
b. Li ____________________________
c. Ca ____________________________
d. Ag ____________________________
e. Eu ____________________________
f. Kr ____________________________