2. Atoms & Elements

Which of the following statements correctly describes isotopes?

Which is the correct isotope symbol for an atom with 42 protons and 49 neutrons?

Which isotope of argon has 22 neutrons?

Which isotope of krypton has 50 neutrons?

What is the atomic number of all calcium isotopes?

Isotopes of an element differ from one another in the number of which subatomic particles they contain?

How many neutrons are contained in the isotope ruthenium-101 (Ru-101)?

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

Which element has its most common isotope containing 5 neutrons?

Which of the following is the correct symbol for the isotope of potassium with 22 neutrons?

An atom has 10 protons and 10 neutrons. Which of the following is an isotope of this atom?

Which of the following best describes the difference between a diploid cell and a haploid cell?

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

What can be inferred about the age of a rock that contains equal amounts of potassium-40 and argon-40?

Which element is represented by an atom that contains six protons and eight neutrons?