You don't know Atom!
Most of the mass of an atom is here
nucleus
Who didn't actually do an experiment, he just thought about it?
Democritus
He was Greek
Democritus
subatomic particle furthest from the center of an atom
electron
The 6 flavours of quark.
up down strange charm top bottom
The volume of an atom is mostly...
empty space!
Whose experiment was using a Cathode Ray Tube (CRT)?
JJ Thomson
He was from New Zealand
Rutherford
Heaviest subatomic particle (just barely)
Neutron
The quarks that make a neutron
down down up
These particles have very little mass, but occupy most of the space in an atom.
electrons
This was Rutherford's famous experiment
Gold Foil
He was from Denmark!
(Something's rotten...)
Niels Bohr
The subatomic particles with a charge
proton and electron
Quarks are even smaller than subatomic particles.
They're __________ particles!
elementary
This is what makes an atom of one element different from an atom of another element.
The number of protons in the nucleus
Niels Bohr looked at these in his experiment.
Emission spectra of gases!
(or...just glowing gases)
Discovered the neutron
Chadwick
protons and neutrons are made of these
quarks
The charge of an up quark
+2/3
This is the sciency word for atoms of the same element that have different numbers of neutrons (and therefore slightly different masses).
isotope
This was the first experiment done to show that matter is made of atoms.
Gases combine in certain ratios to make compounds. John Dalton did this!
This is what Niels Bohr contributed to understanding the atom.
electron shells!
(that electrons only move in certain orbitals around the nucleus)
Symbols for the 3 subatomic particles that make up an atom.
p+ e- n0
The textbook says that protons and neutrons are made of 3 quarks. This is partially incorrect. They're made of an uncountable number of quarks, but they have 3 ______ quarks.
valence