I'm pretty sure that others have probably gone over this before but I don't recall having learned why exactly it is 8 electrons that form a stable shell, I know it has to do with electron spins although I'm not sure what dictates it exactly.
Thank you!
Search found 8 matches
- Sun Mar 12, 2017 8:06 pm
- Forum: General Science Questions
- Topic: Why do 8 electrons form a stable shell? [ENDORSED]
- Replies: 2
- Views: 1952
- Sun Mar 05, 2017 11:12 pm
- Forum: *Organic Reaction Mechanisms in General
- Topic: Homework Problem Number 98 Chapter 15
- Replies: 1
- Views: 488
Homework Problem Number 98 Chapter 15
Suppose that a pollutant is entering the environment at a steady rate R and that, once there, its concentration decays by a first order reaction. Derive an expression for (a) the concentration of the pollutant at equilibrium in terms of R and (b) the half-life of the pollutant species when R = 0. Pl...
- Sun Feb 26, 2017 10:50 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Does a reversible system even exist?
- Replies: 1
- Views: 720
Does a reversible system even exist?
https://qph.ec.quoracdn.net/main-qimg-75284706ae3870bfea4fd758227126ae-c I was just wondering that if energy is always transferred in quanta or certain discrete values, then practically can their ever be a reversible reaction? Or do we assume infinitesimally small is equal to the magnitude of such ...
- Sun Feb 19, 2017 11:05 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3908301
Photonic Joke
A photon checks into a hotel and is asked if he needs any help with his luggage.....
He replies "No I'm traveling light"
He replies "No I'm traveling light"
- Sun Feb 12, 2017 9:00 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3908301
Re: Post All Chemistry Jokes Here
Let's take all these bad Chemistry jokes........ and Barium! :P
- Sat Feb 04, 2017 10:27 pm
- Forum: Phase Changes & Related Calculations
- Topic: Why does it take more energy for a phase change to occur from a liquid to gas than a solid to liquid?
- Replies: 2
- Views: 9928
Why does it take more energy for a phase change to occur from a liquid to gas than a solid to liquid?
Looking at the phase diagram: http://www.sciencegeek.net/APchemistry/APtaters/graphics/phasediagram2.gif
It is clear that Leg B is smaller than Leg D, what is the reason behind this?
It is clear that Leg B is smaller than Leg D, what is the reason behind this?
- Sun Jan 29, 2017 6:08 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Is there a difference between Thermal energy and Kinetic energy? [ENDORSED]
- Replies: 1
- Views: 1842
Is there a difference between Thermal energy and Kinetic energy? [ENDORSED]
If thermal energy is the energy that comes from heat, and heat is the result of the faster movement of a substance's particles, which is ultimately nothing but more kinetic energy in its particles. Then do the two have the same meaning?
- Sun Jan 22, 2017 6:39 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Universe as a system [ENDORSED]
- Replies: 2
- Views: 582
Universe as a system [ENDORSED]
This might be a stupid question but how is the universe an isolated system?
Since the Universe is expanding, how is it an isolated system?The energy of an isolated system must remain constant because no matter or heat can be transferred and the system cannot be physically changed (ΔV = 0)