2. Atoms & Elements

Which term describes two atoms of the same element that have different numbers of neutrons?

Vanadium has an atomic number of 23. How many neutrons are present in the most abundant isotope of vanadium?

Which term is used to describe isotopes of atoms that have unstable nuclei and undergo radioactive decay?

What type of age does the measurement of parent and daughter isotopes in a mineral determine?

Which of the following correctly states the number of protons and neutrons in an atom of iron-56?

The atoms of different phosphorus isotopes _____.

Which of the following best describes isobars?

Which isotope of neon has 10 neutrons?

Which of the following pairs of atoms are isotopes of each other?

Which of the following elements is the least abundant in the Earth's crust?

How many neutrons are present in an atom of uranium-235?

Which of the following statements about the d-block elements in the periodic table is false?

How many neutrons does an atom of phosphorus-31 have? (The symbol for phosphorus is P.)

Which property is shared by all isotopes of calcium, and which property differs among them?

Which of the following is the correct nuclear symbol for a radioactive isotope of copper with a mass number of 60?