Consider the energy levels for Hydrogen in the table below: (note the energy is relative to the energy necessary for an electron to escape. So for Level n = 1 the electron would need to gain 13.6 electron volts to no longer be negative and thus able to escape the atom!) Level (n = ) Energy (in eV)
1 -13.6
2 -3.40
3 -1.51
4 -0.850
5 -.544
6 -.378
What would be the energy of a photon emitted when an electron drops from the n=3 to n=2 level in a Hydrogen atom.

E = eV

The equation for the energy of a photon is where is known as the Planck constant and is equal to eV s.

Since we know that for light we can rewrite the equation for the energy of a photon as

What then is the frequency of the photon from your answer above?

=

Hz

What region of the electromagnetic spectrum does this correspond to?

the answer is a. co2, this would be colder than the : )

explanation:

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.

its pwirhfpiwe

explanation:

because dgjpwojefopjwp