2. Atoms & Elements

An atom of the isotope ¹³C contains how many protons (p), neutrons (n), and electrons (e)?

Which of the following correctly describes how to calculate the number of neutrons in the nucleus of an atom?

Which of the following is the correct name for the silicon isotope with a mass number of 32?

How many neutrons are contained in the isotope molybdenum-96 (Mo-96)?

Which of the following is the correct nuclear symbol for the isotope of argon with mass number 38?

Which statement best describes the existence of nitrogen-14 and nitrogen-15 isotopes?

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

Which statement correctly describes the behavior of triply charged uranium-235 and uranium-238 ions in a mass spectrometer?

Which of the following are the stable isotopes of carbon?

Which element is commonly used in the radiometric dating of fossils?

Which of the following pairs represent isotopes?

How many neutrons are present in an atom of thorium-234?

A potassium atom has a mass number of 37. What is the number of neutrons in this atom?

How many neutrons does a typical sodium (Na) atom have, given that its atomic number is 11 and its most common isotope has a mass number of 23?

Which of the following best explains how one isotope of an element differs from another?