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Unformatted text preview: d weakly away from magnetic fields. With unpaired e-:
Unpaired spins point in the same direction (Hund’s rule).
The atom is paramagnetic.
• attracted to magnetic fields. 1s22s22p63s23p64s23d104p4
1s22s22p63s23p64s23d104p35s1 If individual atom-magnets line up in a bulk sample
A ferromagnet - a permanent magnet. 3 2/6/2009 Energy Units calorie (cal)
“The energy needed to heat of 1g of water from 14.5 to 15.5 °C.”
Now: 1 cal = 4.184 J (exactly) Conservation of Energy
“Energy can neither be created nor destroyed”
E can only change form.
Total E of the universe is constant. Dietary Calorie (Cal) - the “big C” calorie
Used on food products.
1 Cal = 1000 cal
= 1 kcal Also called the 1st Law of Thermodynamics Systems, Surroundings & Internal Energy Energy, Temperature and...
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