2. Atoms & Elements

Which of the following isotopes has 8 neutrons in its nucleus?

An isotope has a mass number of 193 and contains 116 neutrons. What is the atomic number of this isotope?

What is the mass number of a cobalt atom that has 27 protons and 30 neutrons?

How do the isotopes of a given element differ from one another?

How many neutrons are present in the most common isotope of potassium (K-39)?

Mercury has several isotopes. How many neutrons are present in the most abundant isotope of mercury, Hg-202?

Isotopes are atoms that have the same ________ but differing ________.

Which subatomic particle determines the identity of an element?

Which of the following statements best describes isotopes?

Which statement best describes isotopes and how they are similar and different from each other?

Which of the following statements is correct about the isotope of plutonium with 94 protons and a mass number of 241?

How many neutrons are present in the nucleus of an isotope of phosphorus with a mass number of 32?

Which statement correctly describes the number of neutrons in a normal hydrogen atom (protium)?

In what way do isotopes of an element differ from each other?

How many neutrons are present in an atom of magnesium-25 (Mg-25)?