Element Symbols
Element Symbols
Scientists
Misc.
Elemental
100
Al
What is aluminum
100
H
What is hydrogen
100
Came up with the first idea of the atom
Who is Democritus?
100
Atoms with different number of neutrons
What are isotopes?
100
Drew the first periodic table
What is Dimitry Mendeleyev
200
Mg
What is magnesium
200
O
What is oxygen
200
Used a Cathode Ray tube.
Who is Dalton?
200
Atoms with different number of electrons
What are ions
200
The way the periodic table is organized
What is by the atomic number
300
Au
What is gold
300
Ag
What is silver
300
Stated that electrons travel in specific paths
Who is Bohr?
300
Most reactive metals
What are the Alkali metals?
300
Same period as Oxygen, same group as Gallium
What is Boron?
400
U
What is uranium
400
Zn
What is zinc
400
Discovered a small hard dense nucleus
Who is Rutherford?
400
a germ killer in swimming pools
What is chlorine
400
These type elements are made in a lab
What is synthetic or man-made elements
500
Pb
What is lead
500
Hg
What is mercury
500
Discovered the electron
Who is Thomas?
500
These elements have a full valence shell
What are Noble Gases?
500
The last shell of electrons is called this
What is the valence shell?
M
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