- How much energy is required to raise the hydrogen atom from the ground state n = 1 to the first excited state n = 2 ? What is the wavelength of the line emitted if the atom returned to the ground state from the excited state ?​

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.

The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.

How many grams of magnesium metal will react completely with 8.3 liters of 5.5m hcl? show all work