Light and Quantized Energy
>Electromagnetic radiation. is a kind of ENERGY that behaves like a(n) WAVE as it travels through space.
--- Light is one type of electromagnetic radiation, others ex. include: X rays,
All waves can be characterized by their wavelength, amplitude, frequency,and speed.
>Wavelength.. is the shortest distance between equivalent point on a continuous wave.
>Amplitude.. is the height of a wave from the origin to a crest or from the origin to a trough.
>Frequency.. is the no. of waves that pass a given point in 1 second.
the photo shows the wavelength and the amplitude.
---A (n) Quantum is the minimum, amount of energy that can be lost or gained by an atom.---
Quantum Theory and the Atom.
1. Ground State. the lowest allowable energy state of an atom.
2. Bohr's Model of the atom predicted the FREQUENCIES of the lines in hydrogen's atomic emission spectrum.
3. According to Bohr's atomic model. >the smaller an electron's orbit, the lower the atom's energy level.
4. Also the larger an electron's orbit, the higher-energy orbit.
5. Bohr proposed that when energy is added to a hydrogen atom, it's ELECTRON moves to a higher- energy orbit.
6. ---- the hydrogen atom emits a photon corresponding to the difference b/w the ENERGY LEVELS associated w/ the 2 orbits transitions b/w.
7. Bohr's atomic model failed to explain the atomic emission spectrum of elements other the Hydrogen.
ex. Bohr's atomic model
QMM (Quantum Mechanical Model ). the modern model of the atom that treats electrons a waves.
Atomic Orbital. a three-dimensional region around around the nucleus representing the probability of finding an electron.
The difference b/w Bohr model and QMM(Quantum Mechanical Model ).
QMM treats electrons as waves and does not describe the electrons paths around the nucleus.
Bohr model treats electrons as particles traveling in specific orbits.
Electron Configurations
>The arrangement of electrons in an atom < style="color: rgb(204, 102, 204);">Ground-State Electron Configuration.
--3 Rules define how electrons can be arranged in an atom's orbital.--
Aufbau Principle. states that each electron occupies the lowest energy orbital available.
Pauli Exclusion Principle. states that a maximum of 2 electrons may occupy a single atomic orbital, but only if the electrons have opposite SPINS.
Hund's Rule. states that a single electrons with the same spin must occupy each equal-energy orbital before additional electrons w/ opposite spins occupy the same orbitals.
Well folks good luck on tomorrows test!!! the next blogger will be...............
1 comment:
Thanks Maria. You did a great job!
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