CHEM 1127Q Lecture Notes - Lecture 2: Trailing Zero, Decimal Mark, Significant Figures
44
CHEM 1127Q Full Course Notes
Verified Note
44 documents
Document Summary
A method for writing numbers that is more precise and often shorter. Trailing zeros to the right of a decimal point are significant. Trailing zeros before a decimal point are significant. Take the least number of significant figures. The answer has the same number of decimal places as the number with the fewest decimal places. Don"t round until the end (2. 0 x 5. 01) - 0. 002 = 10. /1. 0x10^1. Always write out all of the units. Write down what you have to start and what you want as your final unit. Fahrenheit- water freezes at 32 and boils at 212. Based on salt water freezing at 0 and. Celsius- water freezes at 0 and boils at 100. John dalton: established atomic theory around 1800. Atoms: the smallest unit of an element. Negative charged particle in atoms are called electrons. Atomic number: number of protons (lower left corner of symbol)
