Atomic History
Periodic Table History
Atomic Structure
Periodic Table Basics
Isotopes
100
The scientist who developed the current model for the atom.
Who is Schrodinger?
100
The Russian scientist who organized the table by mass and rearranged for the properties.
Who is Mendeleev?
100
The subatomic particle in the nucleus with a positive charge.
What is the proton?
100
The group on the periodic table with a full outer shell.
What are the noble gases?
100
The number of protons in an atom of Sodium-23
What is 11?
200
The model of the atom that included evenly distributed positive matter with negative particles.
What is the plum pudding model?
200
The last family added to the periodic table.
What are the noble gases?
200
The subatomic particle in the nucleus that is neutral.
What is the neutron?
200
The group of elements that include the most reactive metals.
What are the alkali metals?
200
The number of neutrons in an isotope of calcium-40.
What is 20?
300
The scientist who developed the first modern atomic theory.
Who is Dalton?
300
The scientist who called the number of protons the atomic number.
Who is Henry Mosely?
300
The subatomic particle that has almost no mass and a negative charge.
What is the electron?
300
The group on the periodic table that contains the most reactive non-metals.
What are the halogens?
300
An isotope that contains 12 protons and 14 neutrons.
What is magnesium-26?
400
The experiment that resulted in the discovery of the nucleus.
What is the gold foil experiment?
400
The scientist who came up with the law of octaves.
Who is John Newlands?
400
The number of electrons the 2nd energy level can hold.
What is 8?
400
The trend on the periodic table that describes how well an element pulls electrons to itself when in a compound.
What is electronegativity?
400
An element whose most abundant form has 17 protons and 18 neutrons.
What is Chlorine?
500
The first model of the atom that included energy levels.
What is the Bohr model?
500
The number of elements in Doberiener's organization system known as the triads.
What is three?
500
The 2 subatomic particles that combine to determine the mass of an atom.
What are protons and neutrons?
500
The trend on the periodic table that describes the energy required to remove an electron from an element
What is ionization energy?
500
An isotope with 120 neutrons and 79 protons
What is Gold-199?
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