Energy would be the correct answer
B
When frequency increases, as does the energy, but wavelength decreases. It also works vise versa; if wavelength were to increase, its frequency and energy will decrease.
I think it’s C atomic radius and numbers of unshielded protons
Events that happen over and over create/become a pattern
Silicon must have 4 single covalent bond, every single bond has 2 electrons (one pair), so 4·2=8 electrons (octet).