Show:
Scientists
Periodic Table
Atoms
Electrons
Misc.
100
Famous for his gold foil experiment.
Who is Ernest Rutherford?
100
A vertical column on the periodic table.
What is a family/group?
100
The parts are protons, neutrons, and electrons.
What are the three parts of an atom?
100
A negatively charged subatomic particle.
What is a Electron?
100
A substance composed of two or more metals.
What is an Alloy?
200
Famous for his Atomic Theory of the different ways elements combine.
Who is John Dalton?
200
A horizontal row on the periodic table.
What is a period/series?
200
The name for the number of protons found in the nucleus of an atom. Identical to the charge number.
What is a Atomic Number?
200
A regular array of metal atoms in a "sea" of valence electrons that are shared among the atoms.
What is a Electron Sea Model?
200
The number of cycles or completed alternations per unit time of a wave or oscillation.
What is Frequency?
300
Famous for his Cathode Ray experiment.
Who is J.J. Thomson?
300
Elements that have eight valence electrons.
What are Noble Gases?
300
The total mass of protons, neutrons and electrons in a single atom.
What is an Atomic Mass?
300
The electrons in the outermost principal energy level of an atom.
What are Valence Electrons?
300
A model that depicts the atom as a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus.
What is Bohr's Atomic Model?
400
Arranged the 63 known elements into a Periodic Table based on atomic mass.
Who is Dmitri Mendeleev?
400
The lettered orbital block for transitional metals.
What are 'd' orbitals?
400
A particle that has no electric charge and has a mass slightly larger than a proton.
What is a Neutron?
400
A diagram where valence electrons are represented by dots placed around the chemical symbol.
What is an Electron Dot Structure?
400
The rule that states that atoms of low atomic number tend to combine in such a way that they each have eight electrons in their valence shells.
What is the Octet Rule?
500
He used the oil-drop experiment to measure the charge of the electron.
Who is Robert Andrews Milikan?
500
The energy that is needed to remove electrons from atoms, which increases from the left to right on the periodic table.
What is Ionization Energy?
500
A atom in which the total number of electrons is not equal to the total number of protons, giving it a positive or negative electrical charge.
What is a Ion?
500
When electrons are completely transferred from one atom to another.
What are Bonding Electrons?
500
All the lines in the emission or absorption spectrum of hydrogen; each one corresponding to an allowed transition between quantum energy levels.
What is the Hydrogen Spectrum?