A measure of the average kinetic energy of particles is
1. thermal energy
2. potential energy
3. volume
4. temperature
4. temperature
At constant temperature, as the pressure of a gas increases, the volume of the gas...
1. increases
2. decreases
3. remains the same
4. increases and then decreases
2. decreases (indirect relationship)
When two substances physically combine and their particles are unevenly distributed throughout the mixture, it is called a
1. homogeneous mixture
2. heterogeneous mixture
3. aqueous solution
4. compound
2. heterogeneous mixture
On the Periodic Table, the number of protons in an atom of an element is indicated by its
1. atomic mass
2. atomic number
3. number of neutrons
4. number of valence electrons
2. atomic number
The bond formed by the sharing of electrons between nonmetal atoms is called a(n)
1. ionic bond
2. metallic bond
3. covalent bond
4. hydrogen bond
3. covalent bond
The following choices are all physical properties except
1. flammability
2. phase of matter
3. melting point
4. density
1. flammability
The frequency of particle collisions against the walls of a container is measured by
1. temperature
2. volume
3. density
4. pressure
4. pressure
A technique that physically separates two substances in a mixture based on their difference in boiling points is called
1. filtration
2. chromatography
3. distillation
4. sublimation
3. distillation
Atoms that have the same amount of protons, but different amount of neutrons is called
1. an ion
2. an isotope
3. an ionic bond
4. an isomer
2. an isotope
The property of an element based on its attraction for electrons is
1. electronegativity
2. ionization energy
3. atomic radius
4. density
1. electronegativity
The phase change that changes from a gas directly to a solid is called
1. deposition
2. sublimation
3. condensation
4. evaporation
1. deposition
At STP, which gaseous sample has the same number of molecules as 3.0 liters of N2(g)?
1. 6.0 L of F2(g)
2. 4.5 L of N2(g)
3. 3.0 L of H2(g)
4. 1.5 L of Cl2(g)
3. 3.0 L of H2(g)
Matter that can be broken down by chemical means is called
1. an element
2. a compound
3. a mixture
4. a solution
2. a compound
Which term is defined as the region in an atom where an electron is most likely to be located?
1. nucleus
2. orbital
3. quanta
4. spectra
2. orbital
Which substance below is held together with ionic bonds?
1. CO2
2. AgCl
3. Br2
4. H2CO3
2. AgCl
Which equation below is used to determine the amount of heat that is released when ice freezes?
1. q=mC(Tf-Ti)
2. q=mHf
3. q=mHv
4. K=C + 273
2. q=mHf
Which 2 changes would make a gas more like an ideal gas?
1. increase temp and increase pressure
2. decrease temp and decrease pressure
3. increase temp, but decrease pressure
4. decrease temp, but increase pressure
3. increase temp, but decrease pressure
A mixture that contains at least 1 metal is called
1. a metallic bond
2. heterogeneous
3. a solution
4. an alloy
4. an alloy
What is the name of the group 17 elements?
1. alkali metals
2. alkaline earth metals
3. halogens
4. noble gases
3. halogens
A molecule that has an uneven distribution of electrons contains
1. ionic bonds
2. polar covalent bonds
3. nonpolar covalent bonds
4. metallic bonds
2. polar covalent bonds
What happens to the potential energy when a sample of water freezes?
1. increases
2. decreases
3. stays the same
4. decreases and then increases
2. decreases
According to the kinetic molecular theory, which statement describes the particles in a sample of an ideal gas?
1. The particles are moving in circular paths.
2. The particles collide, decreasing the total energy of the system.
3. The particles have attractive forces between them.
4. The particles are considered to have negligible volume.
4. The particles are considered to have negligible volume.
A sea of mobile electrons holding atoms of Nickel together is called
1. a metallic bond
2. an ionic bond
3. a covalent bond
4. a hydrogen bond
1. a metallic bond
Which element has similar physical and chemical properties to Lithium?
1. Sr
2. Ar
3. Be
4. K
4. K (potassium)
Water has a high boiling point because its molecules have
1. weak intermolecular forces
2. strong intermolecular forces
3. weak intramolecular forces
4. strong intramolecular forces
2. strong intermolecular forces