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chem quiz 1
| Question | Answer |
|---|---|
| nano | n 10^9 one billionth |
| micro | μ 10^6 one milliionth |
| milli | m 10^3 one thousandth |
| centi | c 10^2 one hundreth |
| kilo | k 10^3 thousand |
| sig figs when multiplying or dividing: | round to amount of digits as number with least sig figs |
| sig figs when adding or subtracting: | round decimal places to same as number with least decimal places |
| percent error equation | actual-expected/expected |
| density= | mass/vol |
| mL= | cm^3 |
| Speed= | distance/time |
| volume= | area x width |
| atom is times larger than nucleus | 10^5 |
| atoms mass is mostly | protons and neutrons |
| mass (g) of proton/neutron | 1.67x10^-24 |
| mass(g) of electron | 9.11x10^28 |
| atomic# | # of protons |
| mass# | #protons+#neutrons |
| ion | when proton# does not equal electron# |
| anion | - charged ion, formed by adding electrons |
| cation | +charged ion, formed by removing electrons |
| Isotopes | atoms of the same element with different #neutrons periodic table shows the weighted* average of each isotope's mass |
Created by:
user-1788656