chem week 1

what are the diatomic elements

• Hydrogen (H₂)

• Nitrogen (N₂)

• Oxygen (O₂)

• Fluorine (F₂)

• Chlorine (Cl₂)

• Bromine (Br₂)

• Iodine (I₂)

what is not made of matter

forms of energy (light, heat, sound), forces (gravity, magnetism, electromagnetism), time, thoughts.

metric system conversion factors

Tera, T, 10^12

Giga, G, 10^9

Mega, M, 10^6

Kilo, k, 10³

Deci, d, 10^-1

Centi, cm, 10^-2

Milli, m, 10^-3

Micro, μ, 10^-6

Nano, n, 10^9

Pico, p, 10^-12

Femto, f, 10^-15

1 cm³ = 1mL

when are sig figs significant vs not significant

significant: non-0 integers, 0s in the middle of non-zero integers, trailing 0s when there’s a decimal point

not significant: leading 0s, trailing 0s when there’s no decimal point

sig fig rules for: multiplication and division

SF in final answer matches the # of SF that has the smallest # of SF

sig fig rules for addition and subtraction

number of SF matches those of the least accurate data point

sig fig rules for all

follow order of operations for all