Ancient Greeks
John Dalton
J.J. Thompson
Ernest Rutherford
Niels Bohr
100
This ancient Greek proposed that all matter can be divided into smaller and small pieces.
Who is Democritus
100
John Dalton revived this person's theory of the atom.
Who is Democritus.
100
Thompson concluded that atoms contain these particles.
What are electrons.
100
Rutherford supervised an experiment to test this scientist's theory that all atoms had positive and negative charges evenly distributed through the atom.
Who is J.J. Thompson.
100
In this year, Bohr proposed that electrons orbit the nucleus of an atom much like the planets orbit the Sun.
What is 1913.
200
This person rejected the idea of the atom.
Who is Aristotle.
200
This name is used to describe John Dalton's theory of the atom.
What is the Billiard Ball Model.
200
Thompson concluded that electrons carried this charge.
What is negative.
200
Rutherford shot positively charged particles through this material.
What is gold foil.
200
Each ________ in an orbit has a definite amount of energy.
What is electron.
300
This name was given by the greeks to represent a single indivisible particle.
What is the Atom.
300
The Billiard Ball Model could not explain this important observation.
What is why some objects attract each other.
300
Thompson theorized that since atoms are neutral and electrons are negative, the rest of the atom has this charge.
What is neutral.
300
Rutherford noticed that some particles shot through the atom were __________.
What is deflected.
300
The farther an electron is from the nucleus the _______ the energy it has.
What is greater.
400
According to the Greeks, atoms are of different sizes, separated by empty spaces and ......
What is in Constant Motion.
400
John Dalton theorized that all matter is made up of atoms, all atoms of an element are identical, atoms of different elements are different, and that atoms are rearranged to form new substances during this type of reaction.
What is chemical reactions.
400
Thompson's model is often referred to as this model.
What is the Plum Pudding Model.
400
Rutherford gave this name to the centre of the atom where small concentrated positively charged particles exist.
What is the nucleus.
400
Bohr proposed that electrons can not be between orbits, but they can ________ from one orbit to another.
What is jump.
500
Aristotle supported the idea that all matter is made up of these four basic substances.
What are earth, water, air and fire.
500
In this year, John Dalton created his theory of the atom.
What is 1807.
500
Thompson theorized that these particles were evenly distributed within the atom.
What are electrons.
500
Rutherford concluded that most of the atom is made of empty space and the nucleus is surrounded by this.
What are a cloud of negatively charged electrons.
500
Bohr proposed that a maximum number of electrons could exist in each orbital shell. The number of electrons located in each of the first three shells from the nucleus outwards are ...
What is 2,8,8.
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