2. Atoms & Elements

What is the average atomic mass of bromine (Br) as listed on the periodic table?

What is the average mass of a single argon atom in grams?

Which of the following values is closest to the atomic mass of a helium atom?

Which of the following elements has an atomic mass closest to 131.3?

What is the atomic number of lithium?

What is the atomic number of potassium?

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

Which element was originally used as the standard for determining atomic weights?

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

If oxygen has an atomic mass of 16, how many grams of oxygen are present in 1 mole of oxygen atoms?

Which of the following is closest to the atomic mass of barium (Ba)?

Which statement best describes the atomic weight of an element?

If the atomic weight of nitrogen is 14.0, what is the mass of 2 moles of nitrogen atoms?

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

What is the mass number of an atom with 5 protons and 7 neutrons?