2. Atoms & Elements

What is the average mass of a single silicon (Si) atom in grams?

Which has a greater mass: one mole of carbon-12 atoms or one mole of oxygen-16 atoms?

Which of the following is the number of protons in a thorium (Th) atom?

Which is the first element in the periodic table with an atomic mass greater than 100?

Which term describes the weighted average mass of the isotopes of an element?

Which of the following is closest to the atomic mass of zinc (Zn)?

The atomic mass of an element is equal to the number of:

Which of the following best defines the atomic mass unit (amu)?

Which of the following is closest to the atomic mass of bromine (Br)?

An atom of iodine contains 75 neutrons. What is its mass number?

Atomic mass is measured in which of the following units?

Which of the following correctly describes how to determine the mass number of an atom or ion?

Which element is used as the standard for defining the atomic mass unit (amu)?

Which of the following factors directly affect the average atomic mass of an element that exists as a mixture of isotopes?

Which of the following is closest to the atomic mass of copper (Cu)?