2. Atoms & Elements

What is the approximate atomic mass (in atomic mass units, u) of an atom that contains 26 protons and 30 neutrons?

What is the mass number of a potassium (K) atom that has 20 neutrons?

Which property determines an atom's identity as the element phosphorus?

Which property determines the identity of the element mercury?

Which of the following is the atomic mass of gold (Au)?

Which of the following is closest to the atomic mass of oxygen (O) as listed on the periodic table?

Which of the following is closest to the atomic mass of oxygen?

What is the approximate atomic mass (in atomic mass units, u) of an atom that contains 26 protons, 26 electrons, and 19 neutrons?

Which of the following best describes how to calculate the average atomic mass of an element?

Which of the following is closest to the atomic mass of aluminum (Al)?

Which of the following is the atomic number of zirconium (Zr)?

Which of the following properties uniquely identifies every element?

2. What is the atomic mass of mercury (Hg)?

Which term represents the sum of the atomic masses of the atoms in a molecule?

10. What is the atomic mass of copper?