The Atomic Theory
The Atom!
The Weight of it All!
The Organization of it All!
Mix-It Up!
100
The first person to theorize that matter could be cut.
Who is Democritus?
100
Subatomic particles with no charge
What are neutrons?
100
The number of protons is determined by this measure
What is the atomic number?
100
Dimitri Mendeleev organized the elements according to this measure.
What is their atomic mass of the elements?
100
Electrons travel in energy levels called
What are orbits?
200
The final atomic model was created by these two scientists.
Who are Schrodinger and Heisenberg?
200
Subatomic particles with a positive charge.
What are protons?
200
If you subtract the atomic number from the amu what does this tells
The number of neutrons
200
Using the atomic number to organize the periodic table was presented by
Who is Henry Mosley?
200
If there are 18 protons, there are_____electrons
What is 18?
300
Ernest Rutherford discovered the atom was not a soft blob but had a positively charged component called a
What is the nucleus?
300
Quarks make up these particles.
What are protons and neutrons?
300
An element is defined by
What is the number of protons?
300
Elements are arranged by their properties into three main categories.
What are metals, non-metals and metalloids?
300
An atom that is out of balance and can change its charge from positive to negative.
What is an ion?
400
Niels Bohrs thought that electrons traveled around the nucleus in this manner
What is a designated path?
400
Atoms make up the simplest and purest form of all matter known as
What are elements?
400
Electrons have an amu of
What is nothing measurable?
400
There are 18 vertical columns which form what are known as these and seven horizontal rows known as these.
What are groups and periods respectively.
400
An element with a mass of 21.001 and 11 protons will have this many neutrons
What is 10?
500
He discovered that the atom contained subatomic particles.
Who is J.J. Thompson?
500
The amu is a measure of these particles
What are protons and neutrons
500
All of the cars in the world put inside a 12" by 12" box represents what part of the atom?
What is the density of its nucleus?
500
Why is the organization according to Atomic number is more accurate than atomic mass?
What is the inclusion of the isotopes?
500
Name the number of allowable electrons in levels 1, 2, 3, 4, and 5
What is 2, 8, 18, 32, 50?
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