2. Atoms & Elements

Which of the following pairs are isotopes of each other?

How many neutrons are present in the isotope lithium-7?

Which isotope is commonly used to determine thyroid activity and treat diseases of the thyroid?

In the isotope name carbon-14, what does the number 14 represent?

How many protons are present in an atom of potassium-29?

Which of the following correctly describes the nuclear composition of uranium-235?

Which of the following is the number of neutrons in the most abundant isotope of lead, Pb-208?

Which of the following statements describes an isotope?

What does the number 84 in the name krypton-84 represent?

Which atom has a nucleus that contains 13 protons and 14 neutrons?

Which radioactive isotopes were discovered by Marie and Pierre Curie?

In the isotope polonium-218, what does the number 218 represent?

How many neutrons are present in the most abundant isotope of lead?

How many neutrons are present in an atom of lead-207 (Pb-207)?

Which isotope of argon (Ar) has 22 neutrons?