1. Intro to Chemistry

2. Scientific Notation Review your handout from before 10 = 1 x 10 1 1000 = 1 X 10 3 = 10 x 10 x 10.1 = 10 -1 = 1/10.01 = 10 -2 = 1/100 = 1/10 2.001 = 10 -3 = 1/1000 = 1/10 3 1 = 1 0 2000 = 2(1000) = 2 x 10 3 ↑ any number between 1-10 = 10 +or-

3. 600,000 = 6 x 10 5 17,000,000 = 1.7 x 10 7 602200000000000000000000 = 6.022 x 10 23 2070000000 = _______________.0036 = ___________________.00000512 = _________________.00000000085 = ______________

4. Multiplying using exponents = add them together 10 6 x 10 2 = 10 8 2 x 10 4 x 3 x 10 3 = 6 x 10 7 (5 x 10 2 ) (7 x 10 5 ) = 35 x 10 7 = 3.5 x 10 8 ↑ only 1 number before the decimal in scientific notation

5. Dividing Exponents = subtract them 10 5 / 10 3 = 10 2 8 x 10 5 / 2 x 10 9 = 4 x 10 -4 If you are adding, 10 2 + 10 3, do not add unlike exponents Instead, convert back to original form then add So, 10 2 = 100 and 10 3 = 1000 which = 100 + 1000 = 1100 = 1.1 x 10 3