Spring Break CHEM HW
Are you studying chemistry in school either high school or college and how much information on the subject can you recall? Take this quiz and be busy during the spring break. Find out how much information you retained.
- 1.An orbital is a region of space where there is a high probability of finding
- A.
Proton
- B.
Positron
- C.
Neutron
- D.
Electron
- 2.Which statement matches a subatomic particle with its charge?
- A.
A neutron has a negative charge.
- B.
A proton has a negative charge.
- C.
A neutron has no charge.
- D.
A proton has no charge.
- 3.An atom of any element must contain
- A.
An equal number of protons and neutrons
- B.
An equal number of protons and electrons
- C.
More electrons than neutrons
- D.
More electrons than protons
- 4.Which statement compares the masses of two subatomic particles?
- A.
The mass of an electron is greater than the mass of a proton.
- B.
The mass of an electron is greater than the mass of a neutron.
- C.
The mass of a proton is greater than the mass of an electron.
- D.
The mass of a proton is greater than the mass of a neutron.
- 5.The bright-line spectrum of sodium is produced when energy is
- A.
Absorbed as electrons move from higher to lower electron shells
- B.
Absorbed as electrons move from lower to higher electron shells
- C.
Released as electrons move from higher to lower electron shells
- D.
Released as electrons move from lower to higher electron shells
- 6.The valence electrons of a germanium atom in the ground state are located in the
- A.
First shell
- B.
Second shell
- C.
Third shell
- D.
Fourth shell
- 7.The elements on the Periodic Table are arranged in order of increasing
- A.
Atomic mass
- B.
Atomic number
- C.
First ionization energy
- D.
Selected oxidation state
- 8.Which list of elements contains a metal, a metalloid, a nonmetal, and a noble gas?
- A.
Be, Si, Cl, Kr
- B.
C, N, Ne, Ar
- C.
K, Fe, B, F
- D.
Na, Zn, As, Sb
- 9.The two forms of oxygen, O2(g) and O3(g), have
- A.
Different molecular structures and identical properties
- B.
Different molecular structures and different properties
- C.
Identical molecular structures and identical properties
- D.
Identical molecular structures and different properties
- 10.The sum of the atomic masses of the atoms in one molecule of C3H6Br2 is called the
- A.
Formula mass
- B.
Isotopic mass
- C.
Percent abundance
- D.
Percent composition
- 11.What is the total number of electron pairs shared between the two atoms in an O2 molecule?
- A.
1
- B.
2
- C.
6
- D.
4
- 12.When an atom of lithium loses an electron, the atom becomes a
- A.
Negative ion with a radius smaller than the radius of the atom
- B.
Negative ion with a radius larger than the radius of the atom
- C.
Positive ion with a radius smaller than the radius of the atom
- D.
Positive ion with a radius larger than the radius of the atom
- 13.Given the balanced equation representing a reaction: 2NaCl → 2Na + Cl2 To break the bonds in NaCl, the reactant must
- A.
Absorb energy
- B.
Create energy
- C.
Destroy energy
- D.
Release energy
- 14.A molecular compound is formed when a chemical reaction occurs between atoms of
- A.
Chlorine and sodium
- B.
Chlorine and yttrium
- C.
Oxygen and hydrogen
- D.
Oxygen and magnesium
- 15.Which substance can not be broken down by chemical means?
- A.
Ammonia
- B.
Antimony
- C.
Methane
- D.
Water
- 16.Which two physical properties allow a mixture to be separated by chromatography?
- A.
Hardness and boiling point
- B.
Density and specific heat capacity
- C.
Malleability and thermal conductivity
- D.
Solubility and molecular polarity
- 17.The solubility of KCl(s) in water depends on the
- A.
Pressure on the solution
- B.
Rate of stirring
- C.
Size of the KCl sample
- D.
Temperature of the water
- 18.Which sample of water contains particles having the highest average kinetic energy?
- A.
25 mL of water at 95°C
- B.
45 mL of water at 75°C
- C.
75 mL of water at 75°C
- D.
95 mL of water at 25°C
- 19.Under which conditions of temperature and pressure does carbon dioxide gas behave most like an ideal gas?
- A.
Low temperature and low pressure
- B.
Low temperature and high pressure
- C.
High temperature and low pressure
- D.
High temperature and high pressure
- 20.Which process results in a chemical change?
- A.
Tearing tin foil
- B.
Melting an iron bar
- C.
Crushing an aluminum can`
- D.
Burning magnesium ribbon
- 21.For a chemical reaction, the heat of reaction is equal to the
- A.
Potential energy of the reactants, only
- B.
Potential energy of the products, only
- C.
Potential energy of the products plus the potential energy of the reactants
- D.
Potential energy of the products minus the potential energy of the reactants
- 22.Given the equation representing a system at equilibrium: 2SO2(g) + O2(g) <--> 2SO3(g) At equilibrium, the concentration of
- A.
SO2(g) must equal the concentration of SO3(g)
- B.
SO2(g) must be constant
- C.
O2(g) must equal the concentration of SO2(g)
- D.
O2(g) must be decreasing
- 23.The two isomers of butane have different
- A.
Formula masses
- B.
Empirical formulas
- C.
Molecular formulas
- D.
Structural formulas
- 24.An oxidation-reduction reaction involves the
- A.
Sharing of electrons
- B.
Sharing of protons
- C.
Transfer of electrons
- D.
Transfer of protons
- 25.Which energy change occurs in an operating voltaic cell?
- A.
Chemical to electrical
- B.
Electrical to chemical
- C.
Chemical to nuclear
- D.
Nuclear to chemical
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