2. Atoms & Elements

Which of the following best describes the difference between atomic number and atomic mass?

How is an atomic mass unit (amu) defined?

What distinguishes one element from another in terms of atomic structure?

How many protons are present in an atom of krypton?

Which of the following is the atomic mass of fluorine?

Which subatomic particles primarily contribute to the atomic mass of an atom?

Which element has an atomic mass of 106.42?

What is the average atomic mass of platinum (Pt) as listed on the periodic table?

Which of the following is the atomic mass of arsenic (As)?

In the nuclear fission reaction n + 235U → 92Kr + 141Ba + 3n, which of the following is the atomic mass (x) of krypton (Kr) produced?

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

Which number on the periodic table represents the atomic mass of an element?

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?