UE1 Review

Which two symbols represent atoms that are isotopes of the same element?

• C -16

• O -16

• O- 18

An ion with 5 protons, 6 neutrons and a charge of 3+ has a mass number of

• 2

• 5

• 6

• 11

An ion with 5 protons, 6 neutrons and a charge of 3+ has an atomic number of

• 2

• 5

• 6

• 11

An ion with 5 protons, 6 neutrons and a charge of 3+ has how many electrons?

• 2

• 5

• 6

• 11

The average atomic mass for the element above is

• 100 amu

• between 63 and 64 amu

• 44.7 amu

• between 64 and 65 amu

In a mass spectrometer

• particles with the most mass are deflected the most

• particles with the least mass are deflected the most

• particles with the least mass are deflected the least

• all particles deflect the same

Calculate the mass in grams of 3.00 moles of Carbon.

• 3.00 grams C

• 18.0 grams of C

• 36.0 grams of C

• 54.0 grams of C

Calculate the number of moles of aluminum in 65 grams of aluminum.

• 2.4 moles Al

• 5.0 moles Al

• 850 moles Al

• 1800 moles Al

Select the particles that make up Mass Number

• Protons

• Neutrons

• Electrons

• Atoms

Molar mass is used to measure the mass

• of one mole of that substance

• of one atom of that substance

• in amu

• in grams