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Atoms

science

TermDefinition
Atoms smallest unit of matter
Democritus first to present the idea that all matter is made of atoms
John Dalton made the first modern atomic model
Atomic Model all matter is made of atoms, atoms cannot be divided, each element has its own unique atom, and atoms will combine in whole number ratios to form compounds.
JJ Thomson made the plum pudding model
Plum Pudding Model atoms are filled with positively charged fluid and stationary electrons are suspended in fluid
Ernest Rutherford made the planetary model
planetary model nucleus of the atom is a dense mass of positively charged particles and electrons orbit the nucleus
Niels Bohr made the rutherford-bohr model
Rutherford-Bohr model electrons orbit the nucleus in orbits that have a set size and energy and lower energy levels filled first
Erwin Schrodinger made the cloud model
the cloud model electrons do no travel in an exact orbit and we can predict where it will probably be based on energy levels and orbitals
What makes up an atom? protons, neutrons, electrons
mole the unit meaning that you have 6.02x10^23 (Avogadro's number)
Molar mass a value showing the mass of 1 mole of a compound(grams)
1 mole=Avogadro's number =molar mass
formula for moles n=m/M
formula for particles n*6.02E23
Energy levels rings around the nucleus where the electrons can be found
how many energy levels? 7
Orbitals specific paths of travel for a pair of electrons that make up an energy level
4 types of orbitals s, p, d, f
1st energy level
Energy level diagrams a diagram showing the placement of protons electrons, and neutrons of an element
Created by: Gnatalie
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