2. Atoms & Elements

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?

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

An isotope has a mass number of 193 and contains 116 neutrons. What is the atomic number of this isotope?

What is the mass number of a cobalt atom that has 27 protons and 30 neutrons?

How do the isotopes of a given element differ from one another?

How many neutrons are present in the most common isotope of potassium (K-39)?

Mercury has several isotopes. How many neutrons are present in the most abundant isotope of mercury, Hg-202?

Isotopes are atoms that have the same ________ but differing ________.