This was the first model of the atom ever proposed. It was simple and described atoms as tiny spheres
that could not be broken down into smaller pieces.
Democritus's model of the atom
The "Plum Pudding Model" of the atom
The "Rutherford Model" of the atom
The "Quantum Mechanical Model" of the atom
This model this model was the first to show a nucleus, consisting of protons and neutron. Electrons
surround the nucleus but are not shown in distinct energy levels.
The "Rutherford Model" of the atom
The "Plum Pudding Model" of the atom
The "Quantum Mechanical Modell" of the atom
Democritus's model of the atom
Who proposed that electrons move around the nucleus in circular orbits?
Dalton
Thomson
Rutherford
Bohr
Who discovered that atoms are mostly empty space?
Dalto
Thomson
Rutherford
Bohr
Which scientist proposed a new atomic model after discovering the electron in 1897?
Dalton
Thomson
Rutherford
Bohr
Who proposed that electrons move around the nucleus in circular orbits?
Dalton
Thomson
Rutherford
Bohr
This model added on to previous models by showing electrons existed at certain "energy levels".
However it does not accurately show what those levels look like.
The "Bohr Model" of the atom
The "Rutherford Model" of the atom
The "Plum Pudding Model" of the atom
The "Quantum Mechanical Model" of the atom
This model was developed after J.J. Thompson discovered electrons, a particle smaller than an atom. Is
shows electrons floating freely in a positive space.
The "Plum Pudding Model" of the atom
The "Rutherford Model" of the atom
Democritus's model of the atom
The "Quantum Mechanical Model" of the atom
What does the nucleus of an atom contain?
Electrons & Neutrons
Protons & Neutrons
Neutrinos & Positrons
Ernest Rutherford discovered that atoms were mostly _________________.
negatively charged
positively charged
electrons
empty space.
In the gold foil experiment, most of the positively charged alpha particles passed through the gold foil,
but some were deflected or bounced back. What did we conclude because of this?
Atoms are small indivisible spheres
Atoms are mostly empty space with a small, dense, positive center
Atoms have negatively charged particles which orbit the nucleus
Light is a wave, not a particle
Idea was of an indivisible particle of matter he called "atomos"
John Dalton
Aristotle
Democritus
Plato
He discovered the neutron in the nucleus and completed the current atomic model.
J.J. Thomson
Ernest Rutherford
Niels Bohr
James CHadwick
He found that atoms have smaller parts and found negative electrons that he theorized were
surrounded in a sphere of positive charges
J.J. Thomson
Ernest Rutherford
Niels Bohr
James Chadwick
He found the positively charged protons in the nucleus and said that electrons moved around the
nucleus
J.J. Thomson
Ernest Rutherford
Niels Bohr
James Chadwick
He found that electrons have specific amounts of energy and move in specific orbits around the nucleus,
like planets orbiting the sun.
J.J. Thomson
Ernest Rutherford
Niels Bohr
James Chadwick
The atomic particle with no charge is the...
proton
neutron
electron
nucleus
The atomic particle with a positive charge is the...
proton
neutron
electron
nucleus
The atomic particle with a negative charge is the...
proton
neutron
electron
nucleus
The smallest part of the element with the properties of the element is the...
electron
quark
atom
proton
Which is an electron?
A
B
C
The Early model of the atom that states that all matter is made of atoms that are indivisible and
indestructible.
Dalton's Atomic theory
Thomson’s Plumb Pudding Model
Bohr’s Atomic Model
Electron Cloud Atomic Model
Describes possible locations of electrons around the nucleus.
Dalton’s Atomic Theory
Thomson’s Plumb Pudding Model
Bohr’s Atomic Model
Electron Cloud Atomic Model
Suggested that negative electrons are stuck into a lump of positive charge.
Dalton’s Atomic Theory
Thomson’s Plumb Pudding Model
Bohr’s Atomic Model
Electron Cloud Atomic Model
States that electrons move in spherical orbits around the nucleus.
Dalton’s Atomic Theory
Thomson’s Plumb Pudding Model
Bohr’s Atomic Model
Electron Cloud Atomic Model
First model to have electron energy levels.
Dalton’s Atomic Theory
Thomson’s Plumb Pudding Model
Bohr’s Atomic Model
Electron Cloud Atomic Model
What is the mass number of Hydrogen-2?
0
1
2
3
How many protons does 42He have?
2
3
4
6
How many neutrons does 126C have?
6
12
18
0
How many protons are in 158O ?
8
15
7
33
If an element has 7 protons and 7 neutrons, what element is it?
Silicon
Nitrogen
Indium
Sodium