2. Atoms & Elements

Which of these refers to atoms with the same atomic number but different atomic masses?

Can the isotope 235U decay directly into an isotope of 236Pb through a single nuclear decay process?

Which statement correctly describes radioactive isotopes?

Which of the following statements correctly describes isotopes?

Which of the following isotopes has the greatest number of protons?

Which of the following best describes the composition of an isotope of calcium (atomic number 20)?

How many neutrons are present in the isotope lithium-8?

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

Which isotope is represented by an oxygen atom with 10 neutrons?

Which of the following is the same among isotopes of the same element?

How many neutrons does the isotope nitrogen-15 have?

Which of the following atoms has the largest number of neutrons?

Vanadium (V) has two naturally occurring isotopes: V-50 and V-51. How many neutrons are present in the isotope V-51?

How many neutrons does a typical magnesium atom have if its atomic number is 12 and its most common isotope has a mass number of 24?