Density
the formula for density
d = m/V
First came up with the concept of the atom and called it "indivisible"
Democritus
An example of a homogeneous mixture
Various (any mixture where you can't see the separate components)
The state of matter with the lowest energy (of the 3 main states)
solid
The type of subatomic particle that affects the element name
proton
what density measures
the amount of stuff (mass) in a certain area (volume)
One of the two scientists who proposed our currently accepted model of the atom: The Electron Cloud Model
Schrodinger or Heisenberg
An example of a compound
various (a pure substance made of 2 or more different elements bonded together)
Name of the transition from solid to liquid
melting
What mass number counts
protons + neutrons
The density of water
1 g/mL
Where the vast majority of the mass in an atom is located
The nucleus (in the center)
example of a chemical property
reactivity or flammability
The fourth state of matter, which is actually the most abundant in the universe
plasma
This family of elements must be in brackets when abbreviating an electron configuration
noble gases
standard unit of density for solids
g/cm3
He proposed the planetary model of the atom
Bohr
example of a physical change
various (any change that doesn't change the identity of the substance)
Name of the transition from solid directly to gas
sublimation
The number of electrons that a p subshell can hold
6
He used water displacement to help a king sniff out a scammy crown
Archimedes
He discovered electrons using a cathode ray
Thomson
example of a chemical change
Formation of frost directly from water vapor is an example of this transition between states of matter
deposition
The number of valence electrons halogens have
7