2. Atoms & Elements

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?

Gallium has two naturally occurring isotopes: Ga-69 with a mass of 68.9256 amu and a natural abundance of 60.11%, and Ga-71. If the atomic mass of gallium is 69.723 amu, what is the mass of Ga-71?

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?

Isotopes of a given atom

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?