2. Atoms & Elements

A typical atom of neon has an atomic number of 10 and a mass number of 20. How many neutrons does it contain?

How many neutrons are present in an atom of potassium-39?

What is the total number of neutrons in an atom of potassium-42 (K-42)?

An atom of carbon-14 has 6 protons. How many neutrons does this atom have?

Which isotope of barium has 82 neutrons?

How many neutrons are present in the isotope tin-118?

Which of the following statements about stable isotopes is correct?

Which isotope of lead has 126 neutrons?

An atom of chlorine and an atom of bromine have the same:

Which statement correctly describes how isotopes of a given element differ and how they are similar?

Which of the following atoms has the smallest number of neutrons?

Which of the following correctly describes how to determine the number of neutrons in an atom?

Can two atoms with the same mass number ever be isotopes of each other?

An atom of krypton-84 (Kr) has an atomic number of 36. How many neutrons are present in one atom of krypton-84?

What is the mass number of the isotope zinc-65?