Electrons and Light Unit 4 A Electron Configuration
- Slides: 12
Electrons and Light! Unit 4 A
Electron Configuration Review! p Write the Noble Gas Configurations for these elements! n n n Fe Rb Cl
Noble Gas Configurations & Valence Electrons p Fe – [Ar]4 s 23 d 6 p Rb – [Kr]5 s 1 p Cl – [Ne]3 s 23 p 5 p Valence e- - electrons in the highest orbital or energy level.
Valence Electrons p Fe – [Ar]4 s 23 d 6 {2 valence e-} p Rb – [Kr]5 s 1 {1 valence e-} p Cl – [Ne]3 s 23 p 5 {7 valence e-} p These are the electrons that are involved in bonding and chemical reactions!!!!!!!
Valence Electrons and the Periodic Table
What do e- have to do with light? p When you add energy to an element (perhaps by heating it up), the valence eget “excited”. In other words they jump up to a higher energy level or orbital. p BUT… they are unstable up there. So they release that added energy in the form of colored light! p Huh?
So what exactly is light? p Light is a wave of energy, a small part of the electromagnetic spectrum!
Light as a Wave p p Light moves in wave from the light source to you eye or other detector! Waves have several characteristics!
Wave Characteristics c = λ× ν c = speed of light = 3. 00 × 108 m/s λ = wavlength ν = frequency
Light can also act as particles, we call them PHOTONS!!!!!! p Moving along those waves, there are little packets of energy called photons. n Photons have specific amounts of energy as determined by the frequency of the light. n. E =h×ν n. E = hc λ n The higher the frequency of the light, the more energy the light has.
So how does light tie into excited electrons? p When you add energy to an element, it’s valence e- absorb that packet of energy & become unstable. In order to return to stability (lower their energy) they “spit out” that energy in the form of a photon that has a frequency in the visible light part of the electromagnetic spectrum that we can see.
- 1s 22 s22 p63 s23 p64 s2
- Unpaired electrons in electron configuration
- Electrons in atoms section 3 electron configuration
- Electron configuration for 5 electrons
- Electron configuration vs noble gas configuration
- Light light light chapter 23
- Light light light chapter 22
- Light light light chapter 22
- Quantum numbers and electron configuration
- N and l electron configuration
- Weakness of bohr's atomic model
- Diamagnetic elements
- 42 electron configuration