Early Atomic Theory
created the term "Atom"
What is Democritus
Discovered the nucleus
Ernest Rutherford
Negative charge
What is the electron
A column in the periodic table
what is a Group
Number of protons in an atom
What is the atomic number?
English chemist, physicist, and meteorologist.
What is John Dalton?
Discovered the electron
What is J.J Thomson
No charge
Neutron
A row in the periodic table
what is Period, Energy level
The number of protons + neutrons
What is the mass number?
Atoms can be divided into particles, atoms can be created and destroyed
What is Daltons atomic theory?
Discovered the proton
Who is Eugen Goldstein?
Positive charge
What is a proton?
what is Electromagnetic Spectrum?
Weighted average mass of all isotopes
what is the Average atomic mass
scientific theory of the nature of matter, which states that matter is composed of discrete units called atoms
Discovered the Neutron
Who is James Chadwick?
Particles located in the nucleus
Family lead (Pb) belongs too on the periodic table
What is the carbon family?
An element with different numbers of neutrons
what are Isotopes ?
First atomic theory
Who is democritus?
discovered that atoms are composite objects, made of pieces with positive and negative charge, and that the negatively charged electrons within the atom were very small compared to the entire atom.
What is the plum pudding model?
Location of electrons
What is the electron cloud?
Group that is on the far left side of the periodic table
what are alkali and alkali earth metals?
Is equal to one twelfth of the mass of carbon
what is a Atomic mass unit