Basic Stoichiometry Quiz

The mass of a single atom of a chemical element is called

• Atomic Mass

• Atomic Mass Unit

• Atom

• Isotope

The mass of an atom relative to 1/12th the mass of Carbon-12 atom is called

• Atomic Mass

• Atomic Mass Unit

• Atom

• Isotope

The atomic mass of an atom found in the periodic table is the average masses of the known

• Atomic Mass

• Atomic Mass Unit

• Atom

• Isotope

The smallest part of an element that can take part in a chemical reaction is the

• Atomic Mass

• Atomic Mass Unit

• Atom

• Isotope

Elements in a ________ are always present in fixed ratios.

• Compound

• Atomic Mass Unit

• Atom

• Isotope

The percentage amount of all naturally occurring isotopes of an element is called

• Percent Abundance of Isotope

• Mole

• Relative Atomic Mass

• Molecular Mass

The weighted average of the masses of the isotopes of an element compared to 1/12 of the mass of Carbon-12 atom.

• Percent Abundance of Isotope

• Mole

• Relative Atomic Mass

• Molecular Mass

The “counting unit” used by chemists to show the number of atoms, ions or molecules present in a particular chemical sample.

• Percent Abundance of Isotope

• Mole

• Relative Atomic Mass

• Molecular Mass

 A mole of any substance contains exactly ______ particles.

• 1.66 x 10²⁴

• Mole

• Relative Atomic Mass

• 6.02 x 10²³

 The mass of a molecule that is equal to the sum of the masses of all the atoms contained in the molecule.

• 1.66 x 10²⁴

• Molecular Mass

• Relative Atomic Mass

• 6.02 x 10²³