EOC CHEMISTRY REVIEWEOC 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. Number of valence electrons

b. Number of protons

c. Number of neutrons

d. Atomic mass

What do neon, argon, krypton and xenon have in common?

a. They are metalloids.

b. They belong to the same period.

c. Their outermost energy levels are full.

d. 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. 3+

• B. 3-

• C. 9+

• D. 9-

• When an atom losses an electron, it becomes a

• A. Neutral atom

• B. Neutral ion

• C. Positive ion

• D. 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. She is looking at a model of a covalent bond.

b. She is looking at a model of an acid.

c. She is looking at a model of an ionic bond.

d. 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. Heat

• B. Temperature

• C. Mechanical energy

• D. 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. Sublimation

b. Evaporation

c. Melting

d. 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. An ionic compound

• B. A polar compound

• C. A nonpolar compound

• D. Made up of ions

•

• One characteristic of acids is that they

• A. Turn red litmus paper to blue

• b. Taste bitter

• C. Increase the number of OH- ions

• D. 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

the nuclide 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.

80

35

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