An atom of 26Mg contains ________ neutrons.

How many protons (p) and neutrons (n) are in an atom of Tc?

Identify the correct values for a 4f sublevel.

How many protons are in nickel?

Choose the ground state electron configuration for Zn2⁺.

Give the ground state electron configuration for Pb.

Each of the following sets of quantum numbers is supposed to specify an orbital. Choose the one set of quantum numbers that does NOT contain an error.

The de Broglie wavelength of an electron with a velocity of 7.40 × 106 m/s is ________ m. The mass of the electron is 9.11 × 10-28 g.

Give the complete electronic configuration for Br-.

Which of the following elements is a alkali metal?