How many molecules are in 2.50 moles of SiO2?

An ion has 12 protons, 14 neutrons, and 10 electrons. The symbol for the ion is

What mass (in mg) does 0.04518 moles of silver have?

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.