2. Atoms & Elements

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?

How many neutrons are in a typical lithium atom with an atomic mass of 7?

Which of the following is correct for isotopes of the same element?

What is the mass number of an iron atom that has 28 neutrons?

Which subatomic particle is found in the nucleus of an atom and has a positive charge?