Give the ground state electron configuration for the ion of Ba.

Give the value of l for a 3p sublevel.

The atomic number for lithium is

Which of the following elements is a halogen?

Give the ground state electron configuration for Mg2⁺.

For a hydrogen atom, which electronic transition would result in the emission of a photon with the highest energy?

Determine the mass of a ball with a velocity of 40.0 m/s and a wavelength of 8.92 × 10-34 m.

A new compound was recently discovered and found to have an atomic weight of 342.38 amu. This element has two isotopes, the lighter of which has a mass of 340.91 amu and an abundance of 68.322%. What is the mass of the heavier isotope?

In which orbital below would an electron (on average) be farthest from the nucleus?

Identify the characteristics of a gas.