CH101 Unit 1

deca (da)

10^1

hecto (h)

10²

kilo (k)

10³

mega (M)

10^6

giga (G)

10^9

tera (T)

10^12

peta (P)

10^15

exa (E)

10^18

zetta (Z)

10^ 21

yotta (Y)

10^ 24

deci (d)

10^-1

centi ( c)

10^-2

milli (m)

10^-3

micro (µ)

10^-6

nano (n)

10^-9

pico (p)

10^-12

femto (f)

10^-15

atto (a)

10^-18

zepto (z)

10^-21

yocto (y)

10^-24

Z / atomic number

number of protons

A / mass number

total number of protons + neutrons

Isotope

Same # protons, different # neutrons

List the electromagnetic spectrum in order of wavelength

gamma rays < x rays < uv rays < infrared rays < FM < TV < shortwave < AM

Law of conservation of mass

Atoms don’t just get made or disappear (discovered by Antoine Lavosier in 1789)

Wavelength

distance between successive crests

Frequency

#waves that pass a point in a certain period of time

Amplitude

distance between peak or trough of the wave and the eq position

elements in the same column…

behave similarly in reactions

elements in the same row…

are about the same size

What is light?

• a wave

• travels at 2.998 × 10^8 m/s

• refers to all electromagnetic waves, all of which travel at the constant speed