Bone Daddeo

Hmmmmm. I was expecting something to come up including something about the motion - energy? - and interaction of particles in chemical (or nuclear) reactions. Is this way off base?

There are indeed laser diodes - injection diodes - and while they are a class of LED, they are truly a horse of a different color. A similar comparison would be a gas discharge lamp - fluorescent light tube - and a gas discharge laser.

Hi Shadow Ununbium is only a place holder until an officially sanctioned name can be agreed upon. This is a process that historically has been rather contentious. Looking at the trend in naming the previous "6d" elements, it'll likely be named after a rock star status scientist. Bonedaddium does have a nice ring to it.

LEDs are not really monochromatic. Pick up a pair of diffraction grating glasses - cheap paper ones with plastic diffraction grating lens are cheap, work great, tons of fun and rather addictive and you will embarrass your wife if you wear them into a restaurant - and see for yourself. While preparing a unit on light, I looked at a whole bunch of different LEDs I had kicking around the old Laboratory for the Study of the Reanimation of Life here in Confusion and kept myself amused for longer than I would care to admit. It's not unusual to have more than 1 color LED in a single package - especially in the water clear packages - whose light output is mixed to give a particular color of light. High quality white LEDs are made of a red, blue and green leds in a single, 2 lead package. You can even buy 4 lead devices (common ground) that let you mix the different LEDs by varying the amount of current driving each color.

Thanks Morp. I assumed we had 100% water vapor in the system produced by boiling water. Your problem Hostie is a horse of a different color and Gay-Lussac will not work. This is a vapor pressure problem. You need to use the Antoine Equation. Following Morp's lead, start by looking at the phase diagram for water. It will show you the phase/phases of water for a given temperature and pressure. You'll immediately see that the relationship between pressure, temperature and phase is not a simple one - which is why the Antoine Equation is not a simple one either. Then look at a vapor pressure table for water to see it numerically and you'll see why we just look up values for water when we need them .

In 20 words or less, how would you define chemistry to a high school student taking chemistry for the first time? Chemistry is defined as ..................................

Mouser Electronics or Digikey will have everything you need. Electronic Goldmine deals in surplus and usually has a nice selection of LEDs at ridiculously low prices. My guess is they use two 1.5 volt button cells and a single super bright or similar LED - no current limiting resistor is needed. The chain is the wire.

Yes. The law of Gay-Lussac tells us that pressure is directly proportional to temperature (Kelvin) when volume is held constant. P1/T1=P2/T2