Fact of the Day-Chemistry

I try to choose between a variety of my classes each day, but today was kind of an odd day. Due to our performance tonight, we had band practice 5th period today. I already had band 1st period. Leaving out Owl Period, of course, that left me with only PreCalc and Chemistry. I did PreCalc last time, so I figured I'd do Chemistry.

• differences in naming covalent and ionic bonds
• ionic bonds are between metals and non-metals and have names like Sodium chloride (NaCl)
• covalent bonds are between two non-metals and have names like Carbon monoxide (CO)
• The difference is that there are prefixes in covalent bonds that tell you how many atoms there are of an element. The only exception is if there is only one of the first element, in which case mono (the prefix for one) is not used.
• Ex: Carbon tetrachloride (1 carbon, 4 chlorines)
• Ex: Carbon monoxide (1 carbon, 1 oxygen)
• Ex: Dinitrogen pentoxide (2 nitrogen, 5 oxygens)

Fact of the Day-World History

I learned about the structure (hierarchy, class system, etc) of people in relation to the castle in Medieval Europe:

• King hires knights to protect himself
• Gives them fiefs in return for their fealty
• These knights may later become nobles and hire their own knights, give them land in exchange for fealty
• The knights hire (enslave) serfs to work the land
• serfs are tied to the land are property of the knight

Fact of the Day-PreCalculus

Math, as I'm sure you've guessed:

• that translating (moving) exponential functions is basically the same as translating any other function ((x-2) would denote a movement of x right two units)