2. Atoms & Elements

Which of the following statements about isotopes is true?

Which of the following is closest to the natural abundance of the isotope Br-79?

An isotope of the element fluorine has 9 protons and 10 neutrons. What is the name of this isotope?

Which of the following represents a pair of isotopes?

Which statement best describes the isotope 12C?

Which element corresponds to a neutral isotope with a mass number of 65 and 36 neutrons?

Which isotope has 14 protons and 15 neutrons?

Which of the following isotopes has the same number of neutrons as phosphorus-31?

If an isotope of lithium contains 5 neutrons, what is its mass number?

Which isotope has 18 protons and 22 neutrons?

How do isotopes of an element differ from each other?

All isotopes of oxygen must have:

A neutral argon atom with a mass number of 40 has how many neutrons?

Which characteristic of potassium makes it useful for dating rocks?

Which statement correctly describes how isotopes of an element are similar and how they are different?