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NC PhyScience Goal 5

EOC Prep

QuestionAnswer
Dalton's Atomic Theory Chemical elements are made up of atoms.Atoms of an element are identical in their masses.Atoms of different elements have different masses.Atoms only combine in small, whole number ratios (1:1, 1:2, 2:3, etc)
J.J. Thompson Plum Pudding Model
Rutherford's Gold Foil Experimental Conclusions the atom is mainly empty space with a dense positively charged center.
Bohr's Model Electrons are arranged in energy levels.
Electron Cloud Model
Number of Electrons in Each Level (2nsquared) 2, 8, 18, 32
Charge of a Proton Positive
Relative Mass of a Proton 1.67262158x10(-27)kg
Location of a Proton found in nucleus
Charge of a Electron Negative
Relative Mass of a Electron Weighs a lot less than protons or neutrons
Location of a Electron Found in orbital levels
Charge of a Neutron Neutral
Relative Mass of a Neutron 1.67262158x10(-27)kgsame as proton
Location of a Neutron Found in nucleus
Formula to calculate the number of protons, neutrons, electrons, and mass number in neutral atoms & ions Neutrons=Atomic Mass-Atomic Number
How does the different mass numbers contribute to the average atomic mass for a given element? the atomic mass is an average of the isotopes
Isotope Symbols Carbon-12C-12
Density the mass per unit volume of a material
Forumula of Density d=m/v
Melting Point temperature at which a solid element becomes a liquid
Boiling Point the temperature at which an element begins to boil.
Phase Changes physical changesEx. liquid to solid
Created by: pram135
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