CHEM 1210 Lecture Notes - Lecture 1: Decimal Mark, Significant Figures, Scanning Electron Microscope

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Published on 12 Sep 2016
School
TNTECH
Department
Chemistry
Course
CHEM 1210
Professor
What is Chemistry?
The study of matter and the changes it undergoes
What is Matter?
Anything that has mass and volume
Macroscale- can be seen by the naked eye
Ex.) a drop of blood
Microscale- can be seen with a microscope (magnify a macroscale times a thousand)
Ex.) Blood cells
Nanoscale- can be seen with a scanning electron microscope (magnify a microscale times a thousand)
Ex.) Hemoglobin
Atomic scale- cannot be seen at all (magnify a nanoscale times ten)
Ex.) Atoms—L, H, O, N, Fe, Etc..
Metric Prefixes
Bigger (more than 1)
Tera- (T) one trillion; 1,000,000,000,000; 10^12—teragram= one trillion grams
Giga- (G) one billion; 1,000,000,000; 10^9—gigagram= one billion grams
Mega- (Mm); one million; 1, 000, 000; 10^6—megagram= one million grams
Kilo- (K); one thousand; 1,000; 10^3—kilogram= one thousand grams
Smaller (less than 1)
Deci-(d); one tenth; 0.1; 10^-1—decigram= one tenth of a gram
Centi- (C); one hundredth; 0.01; 10^-2—centigram= one hundredth of a gram
Milli- (m); one thousandth; 0.001; 10^-3—milligram= one thousandth of a gram
Micro- (mue/mc/micro); one millionth; 0.000001; 10^-6—microgram= one millionth of a gram
Nano- (n); one billionth; 0.000000001; 10^-9—nanogram= one billionth of a gram
Pico- (p); one trillionth; 0.000000000001; 10^-12—pictogram= one trillionth of a gram
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Document Summary

The study of matter and the changes it undergoes. Macroscale- can be seen by the naked eye. Microscale- can be seen with a microscope (magnify a macroscale times a thousand) Nanoscale- can be seen with a scanning electron microscope (magnify a microscale times a thousand) Atomic scale- cannot be seen at all (magnify a nanoscale times ten) Tera- (t) one trillion; 1,000,000,000,000; 10^12 teragram= one trillion grams. Giga- (g) one billion; 1,000,000,000; 10^9 gigagram= one billion grams. Mega- (mm); one million; 1, 000, 000; 10^6 megagram= one million grams. Kilo- (k); one thousand; 1,000; 10^3 kilogram= one thousand grams. Deci-(d); one tenth; 0. 1; 10^-1 decigram= one tenth of a gram. Centi- (c); one hundredth; 0. 01; 10^-2 centigram= one hundredth of a gram. Milli- (m); one thousandth; 0. 001; 10^-3 milligram= one thousandth of a gram. Micro- (mue/mc/micro); one millionth; 0. 000001; 10^-6 microgram= one millionth of a gram. Nano- (n); one billionth; 0. 000000001; 10^-9 nanogram= one billionth of a gram.