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.
Electrons have the lowest energy when closest to the nucleus. Under resting conditions, the electrons are in the lowest possible energy level called. ground state. When atom absorbs a quantum of energy, it causes the electron to jump to a higher energy level called the excited state. Excited atom is energetically unstable, so electron will fall back down very rapidly and energy will given off in the same amount as absorbed but now in the form of a photon of light.