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People
Elements
Periodic Table
Subatomic Particles
Potpourri
100
Came up with the plum pudding model.
Thomson
100
This element has 2 energy levels and 4 valence electrons
Carbon
100
Rows on the periodic table are also called ____________
Periods
100
This particle has a positive charge
proton
100
An atom is mostly ____________________
Empty Space
200
The person who discovered the nucleus
Rutherford
200
This element has 20 protons
Calcium
200
Columns on the periodic table are also called
Groups
200
These particles were the last one found
neutrons
200
The model of the atom we use now is called.......
Electron Cloud Model
300
The four elements Aristotle believed in
Earth, Air, Fire, Water
300
This element has 7 valence electrons and is a liquid at room temperature
Bromine
300
The first group on the periodic table is called ____________
Alkali metals
300
These two particles account for all the mass of an atom
protons and neutrons
300
The elements in the alkaline earth metal group have how many valence electrons.
2
400
The father of atomic theory....he came up with 4 rules.
Dalton
400
This element is the most reactive alkali metal
Francium
400
The group to the far right on the periodic table is called _______________
Noble Gases
400
The protons are also known as the ________________
Atomic number
400
What is the rule called that means that all atoms want 8 valence electrons.
Octet Rule
500
Came up with the solar system model
Bohr
500
This element is the only nonmetal on the left side of the periodic table.
Hydrogen
500
The elements located on the stairstep are called _______________
Metalloids
500
These particles are in charge of bonding.
Electrons
500
Carbon-12, Carbon-13, and Carbon-14 are all _________________________ of carbon.
isotopes