End of Year Review

The gold foil experiment led to the conclusion that each atom in the foil was composed mostly of empty space because most alpha particles directed at the foil

• passed through the foil

• remained trapped in the foil

• were deflected by the nuclei in gold atoms

• were deflected by the electrons in gold atoms

Which subatomic particles are located in the nucleus of a carbon atom?

• protons, only

• neutrons, only

• protons and neutrons

• protons and electrons

A neutron has a charge of

• +1

• +2

• 0

• -1

Which particle has the least mass?

• alpha

• beta particle

• neutron

• proton

A sample of matter must be copper if

• each atom in the sample has 29 protons

• atoms in the sample react with oxygen

• the sample melts at 1768 K

• the sample can conduct electricity

The elements of the Periodic Table are arranged on order of increasing

• atomic number

• mass number

• number of isotopes

• number of moles

Which element has the highest melting point?

• tantalum

• osmium

• rhenium

• hafnium

In chemical reactions, there is a conservation of

• energy, volume and mass

• energy, volume and charge

• energy, charge and mass

• energy, charge and volume

At STP, both diamond and graphite are solids composed of carbon atoms. These solids have

• the same crystal structure and same properties

• the same crystal structure and different properties

• different crystal structure and same properties

• different crystal structure and different properties

The gram formula mass of a compound is 48 grams. The mass of 1.0 moles of this compound is

• 1.0 g

• 4.8 g

• 48.0 g

• 480 g