A double-bond always consists of what?

What type(s) of atomic orbitals are pictured below?

How many d orbitals can exist when n = 4?

Consider the energy level diagram sketch below.

Which of the transitions, a) - e), represents a hydrogen atom in an excited state emitting light and ending up in its ground state?

Calculate the frequency of a photon that has a wavelength of 631 nm.

Note: c = 2.998 × 10⁸ m s^–1.

There are several precautions highlighted in the experimental methods for this experiment. What are they? Tick all correct answers, ticking incorrect answers will result in a reduced mark. 

What types of observations will you make in this experiment that would indicate changes to equilibrium for the reactions being studied? Tick all correct answers, ticking incorrect answers will result in a reduced mark. 

Based on the chemical equations given in the introduction to this experiment, which of the following statements would you expect to be true?

Which of the following is the correct electron configuration for a fluorine atom in its ground state?

Given the interaction energy diagram for an argon dimer (Ar₂) above, select the correct statement: