2. Atoms & Elements

What is the mass number of an atom of nitrogen that contains 8 neutrons?

Which of the following is the correct symbol for the carbon isotope that contains seven neutrons?

How many protons, neutrons, and electrons are present in a neutral atom of the isotope represented by 14_6C?

Which of the following best describes a radioactive isotope?

Which of the following is NOT a very long-lived, radioactive isotope?

Copper has two isotopes. The Cu-63 isotope weighs 62.9296 amu and has 69.17% of the natural abundance. What is the atomic mass (in amu) of the second copper isotope if the average atomic mass of copper is 63.546 amu?

How many more neutrons are present in an isotope of carbon-14 compared to a standard carbon-12 atom?

In which of the following sets do all species have the same number of protons?

Which element has a mass number of 100 and contains 56 neutrons in its nucleus?

An atom of silver-107 (Ag-107) has an atomic number of 47. How many neutrons does it contain?

Which statement is true regarding the radioactive isotope uranium-235?

Which numbers are typically shown in the symbol for a radioactive nuclide?

Which property of isotopes of the same element must be different?

A typical atom of neon has an atomic number of 10 and a mass number of 20. How many neutrons does it contain?

How many neutrons are present in an atom of potassium-39?