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 Chemistry Study Guide

 

particles

 

charge

proton

charge = +1

electron

charge = -1

neutron

charge = 0

Change in the number of particles

   particles            charge    type of particle

protons = electrons

net charge = 0

 

protons > electrons

(Loss of an electron)

net charge =

+

ION

protons < electrons

(Gain of an electron)

net charge =

-

ION

Change in number of neutrons

net charge = 0

Atomic weight changes

 

ISOTOPE

Change in the number of protons

THE NUMBER OF PROTONS NEVER CHANGE

Differences between compounds and mixtures

 

compounds

mixtures

properties of atoms

properties

change

properties

unchanged

separate substances

cannot be easily separated

can be separated by physical means

homogenous

or heterogeneous

does not apply

can be either homogenous or heterogenous

atoms