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Woodruff- Atomic Str

Woodruff- Atomic Structure

Democritus's model of atom 1. All matter is made of small indivisible particles 2. Atoms of different substances are different in size and shape 3. Different kind of atom for every substance
John Dalton's model of atom 1. Atoms cannot be created or destroyed 2. Atoms of same elements have same properties, Atoms of different elements have different properties 3. Atoms of different elements can combine to form new substances
J.J. Thomson's model of atom 1. Atom was a positively charged sphere in which negative particles were scattered- called electrons 2. Electrons- like raisins in pudding
Ernest Rutherford's model of atom 1. Atom has tiny positive core called a nucleus 2. Electrons whirling around outside of nucleus 3. Most of atom is empty space.
Niels Bohr's model of atom 1.Electrons move in paths. Distance from nucleus- called energy level 2. Electrons in each energy level-definite amount of energy 3.Levels farther from nucleus have greater energy 4. Add energy to electron-moves out in orbit, loses energy-moves back in
Erwin Schrodinger's modle of atom 1. Electron cloud model 2. Electrons moving rapidly in regions of space around a nucleus
proton's location nucleus
proton's charge + 1
proton's mass 1
proton's symbol p
neutron's location nucleus
neutron's charge 0
neutron's mass 1
neutron's symbol n
electron's location orbit outside the nucleus
electron's charge -1
electron's mass 1/1836 "0"
electron's symbol e-
name for protons and neutrons nucleons
atomic number the number of protons in the nucleus of an atom
In a neutral atom, when you know the number of protons, you also know the number of electrons
Define mass number the sum of the protons and neutrons in an atoms (the number of nucleons)
How would you determine the number of neutrons in an atom? subtract the atomic number from the mass number
According to the Bohr Model, electrons are found in definite paths called energy levels, skills, rings, or orbits
In energy level K, the quantum number is ___ and the maximum number of electrons held is _____ 1, 2
In energy level L the quantum number is ___ and the maximum number of electrons held is _____ 2, 8
In energy level m, the quantum number is ___ and the maximum number of electrons held is _____ 3, 18
In energy level n, the quantum number is ___ and the maximum number of electrons held is _____ 4, 32
K shell electron have (more, less) energy than n shell electrons less
Created by: seagullq