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History of the Periodic Table
Subatomic Particles
The Periodic Table
Name that Periodic Group
All things Atoms
100
What did Chadwick contribute to atomic theory?
He discovered the neutron
100
Positively charged particles
What is a proton
100
Arranged the first periodic table
Who is Dmitri Mendeleev
100
Group of nonreactive gases
What are the noble gases
100
Atoms are made of these three types of particles
What are protons, electrons, and neutrons
200
Worked with the hydrogen atom and theorized that electrons orbit the nucleus in energy levels
Who is Niels Bohr
200
Negatively charged particles
What is an electron
200
How was the first periodic table arranged
By increasing atomic mass and similar chemical properties
200
This group is relatively stable and the elements are often used to make alloys as well as the compounds that make up fireworks
What are transition metals
200
The atomic mass is located where on the elements block
Below the elements symbol
300
Discovered the nucleus through his gold foil experiement
Who is Ernest Rutherford
300
The number of this particle in an atom is equivalent to the atomic number
What is a proton
300
Vertical columns on the periodic table are called __________
Groups
300
This group reacts violently with water
What are the alkali metals
300
The atomic number is located where on the elements block
Above the elements symbol
400
Generated the atomic theory
Who is Dalton
400
Protons and Neutrons have this in common
Both have a mass unit of 1 and they are both located in the nucleus
400
Horizontal rows on the periodic table are called __________
Periods
400
This group of gases are extremely reactive and commonly form compounds with group 1 metals
What are the halogens
400
How do you calculate the number of neutrons in an atom
Atomic Mass - # of protons = # neutrons