chem things to memorize

grams to moles

grams / molar mass

moles to grams

moles x molar mass

particles to moles

particles / 6.02 × 10 ^ 23

what is the most abundant isotope in a mass spectroscopy

the tallest peak

empirical formula steps

1. grams to moles

2. divide by smallest

3. whole numbers!!!

percent comp

mass of component / total mass x 100

mass number is

protons + neutrons

order of electron configuration

1s 2s 2p 3s 3p 4s 3d 4p 5s 4d 5p 6s 4f 5d 6p

if a question asks which electron is easiest to remove, look for

the electron with the lowest binding energy (lowest relationship with the nucleus)

atomic radius trends

decreases across a period

increases down a group

biggest atoms are towards where

bottom left

smallest atoms are towards the

top-right

what is ionization energy

energy needed to remove an electron

ionization energy trends

increases across a period

decreases down a group

where is the highest ionization energy

top-right

where is the lowest ionization energy

bottom-left

electronegativitu

increases toward top-right