EOC CHEMISTRY REVIEW
• This graph shows the change in
temperature over time in a chemical
reaction. According to the graph this
chemical reaction is:
• A. Endothermic
• B. Exothermic
Temp.
• C. Unbalanced
• D. Combustion
»
Time
The property that determines how an atom
of an element reacts with other atoms is
the atoms:
a.
b.
c.
d.
Number of valence electrons
Number of protons
Number of neutrons
Atomic mass
What do neon, argon, krypton and xenon
have in common?
a.
b.
c.
d.
They are metalloids.
They belong to the same period.
Their outermost energy levels are full.
They share the same number of protons.
• Atomic radii tend to decrease with
increasing group number.
• True
• False
• You are studying a sample of an element. You
determine that the element’s atoms has seven
valence electrons. Select the true statement.
• A. The element is a noble gas, so it is unreactive.
• B. The element is a transition metal, so it is shiny, and a good
conductor of electric current.
• C. The element is a halogen so it is unreactive.
• D. The element is a halogen so it is a nonmetal, very reactive,
and a poor conductor of electric current.
Predict the chemical formula for
iron (III) bromide.
Predict the chemical formula for
iron (II) oxide
• What is the charge of the nickel ion in
nickel nitrate, Ni(NO3)3, if NO3- has a
charge of -1.
•
•
•
•
A.
B.
C.
D.
3+
39+
9-
• When an atom losses an electron, it
becomes a
•
•
•
•
A.
B.
C.
D.
Neutral atom
Neutral ion
Positive ion
Negative ion
• Which is true of ionic compounds?
• A. Ionic compounds cannot form crystals.
• B. Ionic compounds generally have low melting points
• C. Ionic compounds generally have high boiling points.
• D. Ionic compounds are often gases at room temperature.
• Write the correct electron configuration for
Mg 2+ ion.
• Write the formula for copper II sulfate.
• What is the name for Ba(OH)2
• What is the shape of a water molecule?
•
•
•
•
A. linear
B. bent
C. trigonal planar
D. tetrahedral
During a laboratory experiment, Juanita
observes a model of two bonded atoms.
She is told that the atoms are both
nonmetals. Which is a valid conclusion?
a.
b.
c.
d.
She is looking at a model of a covalent bond.
She is looking at a model of an acid.
She is looking at a model of an ionic bond.
She is looking at a model of a salt.
• What is the formula for
dinitrogen pentoxide?
• Molybdenum has a molar mass of 96 amu.
How many moles are present in l50g of
molybdenum?
Calcium has an atomic mass of 40 amu.
What is the mass in grams of .330moles?
Balance the equation
Al + H3PO4
AlPO4 + H2
• A chemical reaction produced 98.0ml of
sulfur dioxide gas at STP. What was the
mass of the gas produced.
2Mg (s) + O2
2MgO (s)
What mass of magnesium oxide is produced
from 2 mol of magnesium?
What mass of oxygen combines with 2 mol
of magnesium?
• A measure of the average Kinetic energy of
the particles in an object is the objects...
•
•
•
•
A.
B.
C.
D.
Heat
Temperature
Mechanical energy
state
CH4 + 2O2
CO2 + 2H20 + energy
N2 + O2 + energy
2NO
Which is true?
a. Equation 1 in endothermic
b. Equation 2 is endothermic
c. Both equation are exothermic
d. It is not possible to determine the type of reaction
What is entropy?
During which phase change does a sample
of matter release energy?
a.
b.
c.
d.
Sublimation
Evaporation
Melting
condensation
• Label the phase chart
• How many moles of oxygen gas are there
in 135 L of oxygen at STP?
• A chemical reaction produces .0680 mol of
oxygen gas. What Volume in liters is
occupied by this gas sample at STP?
• What is the volume of .250 mol of oxygen
at 20oC and .974atm pressure?
How many grams of calcium carbonate must
be decomposed to produce 5.0L of carbon
dioxide gas at STP?
CaCO3
CaO + CO2
• What is the pressure in atmospheres
exerted by a .5mol sample of nitrogen in a
10.0L container at 298K?
• What is the rule for dissolving?
• Water is a common solvent for many ionic
compounds because it is
•
•
•
•
•
A.
B.
C.
D.
An ionic compound
A polar compound
A nonpolar compound
Made up of ions
• One characteristic of acids is that they
•
•
•
•
A.
b.
C.
D.
Turn red litmus paper to blue
Taste bitter
Increase the number of OH- ions
Increase the number of H30+ ions
• When an acid and a base react what is
produced?
•
•
•
•
A. A stronger acid
B. A stronger base
C salts and water
D. A weaker acid
What is the oxidation number for an
uncombined element?
Which is a redox reaction?
• A. C + O2
CO2
• B. NaCl + AgNO3
AgCl + NaNO3
• C. NH3 + HCl
NH4+ + Cl-
• D. H2SO4 + 2KOH
K2SO4 + 2H2O
• What is nuclear fusion?
• What is nuclear fission?
• Symbol for alpha particle
• Symbol for beta particle
• Symbol for gama particle
A student needs to mix 30ml of 6M HCl acid and
100ml of water. What is the safest procedure?
How many liters of 4.5M HCl are required to
neutralize .9 liters of 4.0M NaOH?
What is the density of Cl2 at STP?
Atoms of the same element that have
different numbers of neutrons are…
An atom of K-39, has fewer___________
Compared to Ca-40.
How many protons, neutrons, electrons in
80
the nuclide
35
Br
Write the electron configuration of an element in the ground
state of group VA.
Write orbital notation for a noble gas in the ground state.
Which atom in ground state has three e- in the 3p sublevel?
Write electron dot for 1s2,2s2,2p3
Write electron dot for ethyne C2H2
A .4 electronegative is what type of bond.
Write the 4 periodic chart trends.
Which requires the least amount of energy to remove an electron
in the gaseous state?
Sr
Ar
Al
Cl
Which elements have physical and chemical properties similar to
silicon?
What is the difference between six valence electrons and six total
electrons?
Which element forms an ion that is larger than its atom?
Cl
Ca
Li
Mg
What type of bond is in methane?
Write lewis structure for the following.
F2
N2
Br2
H2
What is the type and geometric shape of the bonds for water.
Which contains nonpolar bonds and is a nonpolar molecule?
Methane
florine
hydrofloric acid
hydrochloric acid