Download 2nd semester unit review key

Physical Properties Unit Review
Name________________________Per___
1. Complete the following table for the physical properties of a quarter.
PHYSICAL PROPERTY
QUARTER
PHYSICAL PROPERTY
QUARTER
Color
Silver
State
Luster
Yes
Magnetic
Malleable
no
Conductive
2. What is the density of an object with a mass of 5 g and a volume of 2 cm3?
2.5 g/cm3
3. Which of the following will float in a liquid with a density of 1.5 g/cm3?
A. 1.6 g/cm3
B. 3.6 g/cm3
C. 1.2 g/cm3
4. Complete the following chart for the states of matter.
STATE OF
SHAPE
VOLUME
MATTER
(definite or not)
(definite or not)
Solid
Definite
Definite
Liquid
Not definite
Definite
Gas
Not definite
Not definite
Solid
No
yes
EXAMPLES
DRAWING OF
PARTICLES
Ice
Rock
Water
Juice
Steam
air
6. What causes a substance to change from one state to another?_add or remove energy
7. Write physical or chemical change for each of the following:
Physical
Water evaporating
Chemical
burning toast chemical
nail rusting
Chemical
Fireworks exploding Physical
ice melting
Physical
Ripping paper
8. Write element, compound or mixture below each of the following diagrams.
Compound
Compound Unit Review
1. Complete the following table:
COMPOUND
mixture
element
LIST OF ELEMENTS IN THE
# OF EACH
COMPOUND
ELEMENT
H2SO4
Hydrogen
2
Sulfur
1
oxygen
4
NaCl
Sodium
1
Chlorine
1
Fe2(SO4)3
Iron
2
Sulfur
3
Oxygen
12
2. Chemical bonds occur when electrons are transferred or shared .
3. The combining ability of an atom is called the oxidation number.
4. Describe each bond and draw a diagram to show what is happening with the valence electrons.
IONIC transfer electrons
COVALENT share electrons
Element Unit Review
1. Write the chemical symbol for each of the following:
H
hydrogen
K potassium
C
carbon
O
oxygen
Mg magnesium
Na sodium
2. Use the Periodic Table to complete the following chart:
Element
Atomic Number
Atomic Mass
Protons
8
16
8
Oxygen
11
23
11
Sodium
9
19
9
Fluorine
Li lithium
Cl chlorine
Electrons
8
11
9
Neutrons
8
12
10
Metal or Nonmetal
Nonmetal
Metal
nonmetal
3. Complete the following table:
ATOMIC PARTICLE
Proton
Neutron
Electron
LOCATION
CHARGE
MASS
(in nucleus or outside nucleus)
(positive, negative or neutral)
(1 amu or very little mass)
In nucleus
In nucleus
Outside nucleus
Positive
Neutral
negative
1 amu
1 amu
Very little mass
4. Circle the correct atomic particle for each of the following:
Defines an atom
Protons
Neutrons
Electrons
Isotopes: same type of atom with different number of
Protons
Neutrons
Determines how atoms combine Protons
Neutrons
Electrons
Ions: same type of atom with different number of
Protons
Neutrons
Electrons
Electrons
5. According to current atomic theory, what is the best description for the location of the electrons?
A. Orbiting in perfect rings around the nucleus
B. A cloud around the nucleus showing where an electron is likely to be
6. Complete the following table:
Element
Group or Column #
Period or Row #
# of Energy Levels
# of Valence Electrons
2
3
3
2
Magnesium
14
2
2
4
Carbon
17
3
3
7
Chlorine
7. Which group has the most stable arrangement of electrons in the outer energy level?_ Noble gases
8. Which group name means “salt makers”? halogens
Reactions Unit Review
1. Complete the table below for each reaction:
REACTION
REACTANTS
PRODUCTS
TYPE OF RXN
BALANCED?
Mg + O2  MgO
Mg, O2
MgO
Synthesis
no
KBr + Cl2 KCl + Br2
KBr, Cl2
KCl, Br2
Single
no
HCl + NaOH  H2O + NaCl
HCl, NaOH
H2O, NaCl
Double
yes
H2O2  H2O + O2
H2O2
H2O, O2
Decomposition
no
2.
What is the relationship between the Law of Conservation of Mass and chemical reactions?
In a chemical reaction, matter is rearranged but not created or destroyed, so the grams of reactants and products
will be the same
3.
If a reaction has 17 g of reactants, how many grams of combined products will the reaction have?_17
4.
What is the difference between exothermic reactions and endothermic reactions?
Exothermic—gives off energy
Endothermic—absorbs energy
What factors make a reaction go faster?
Stirring, increasing temperature, increasing surface area, increasing concentration of reactants
5.