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Element Names
Element Formulas
Energy and Temperature
Atomic Structure
Chemists and the Atom
100
H
What is hydrogen?
100
nitrogen
What is N?
100
This scale has zero as the freezing point of water.
What is Celsius?
100
The smallest sample of an element.
What is an atom?
100
This scientist is credited with the discovery of the electron.
Who is J.J. Thompson?
200
Si
What is silicon?
200
chlorine
What is Cl?
200
This scale has zero as the lowest temperature possible.
What is Kelvin?
200
The subatomic particle that has a negative charge.
What is an electron?
200
This scientist is credited with discovering that the energy of electrons is quantized.
Who is Niels Bohr?
300
Sc
What is scandium?
300
calcium
What is Ca?
300
Scientific name for the lowest possible temperature on the Kelvin scale.
What is absolute zero?
300
The subatomic particle that has a positive charge?
What is a proton?
300
The scientist credited with discovering the nucleus.
Who is Ernest J. Rutherford?
400
Na
What is sodium?
400
copper
What is Cu?
400
The conversion from Celsius to Kelvin.
What is adding 273?
400
The central portion of an atom that contains protons and neutrons.
What is a nucleus?
400
This scientist is credited with discovering cathode rays.
Who is William Crookes?
500
Ag
What is silver?
500
mercury
What is Hg?
500
A measure of the average kinetic energy of the particles in a substance.
What is temperature?
500
The portion of an atom where you are most likely to find an electron.
What are orbitals or the electron cloud?
500
The scientist whose description of atoms contained four postulates still considered true.
Who is John Dalton?