Quintal definition: a unit of weight equal to 100 pounds | Meaning, pronunciation, translations and examples English Dictionary | Thesaurus | Translator | Grammar | Scrabble | Blog English
Electrons in a hydrogen atom must be in one of the allowed energy levels. If an electron is in the first energy level, it must have exactly -13.6 eV of energy. If it is in the second energy level, it must have -3.4 eV of energy. An electron in a hydrogen atom cannot have -9 eV, -8 eV or any other value in between. Let's say the electron wants to jump from the first energy level, n = 1, to the second energy level n = 2. The second energy level has higher energy than the first, so to move from n = 1 to n = 2, the electron needs to gain energy.
What is the wavelength of the photon emitted when a hydrogen atom goes from the second energy level to the first energy level? A hydrogen atom becomes ionized when its electrons have enough energy to jump out of the outermost energy level and become free of the atom. An electron near to escaping the atom has the most energy and therefore emits a high-energy photon if it drops all the way to level one. If the photon contains more energy, it has a higher frequency. Also, the lower energy levels are farther apart than the upper levels.