2. Atoms & Elements

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)?

An atom contains 13 protons. What is the approximate atomic mass of this atom in atomic mass units (u)?

Which of the following elements has the greatest average atomic mass?

An atom's atomic mass is best described as the mass of: