can I have the answer if these please Which of the following occure as the energy of a photon increas 1- the frequency decrease 2- the speed increase...

Ml=3

Onlt two electon with opposing spings are allowed each orbitl is known as

1- pauli exclistion principle

2- Hund's rule

3- aufbau principle

4 heisenberg uncertainty principle

Ho many valence electrons do the alkali earth metas possess

a-1

b-2

c-7

d-6

e-8

an excited electron in hydrogen atom emits a photon with a wavelength of 1093.9nm as it makes a transition to the n=3 energy level. from which level did the electron transition from?