Download Atomic Structure Chm 1.1.1

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Atomic Structure
Chm 1.1.1
Matter
Matter
Mixtures
Pure Substances
Compounds
Elements that are CHEMICALLY
bonded together
Can’t be separated by
physical means
Elements
Made up of 1 type of atom
Atoms
• Smallest unit of matter
That has the
characteristics of the
element
What elements are
made of
Regions of the Atom
Nucleus
Electron Cloud
-Area surrounding
the nucleus
Nucleus
Subatomic Particles:
Proton –
mass = 1amu
positive charge
Neutron –
mass = 1amu
no charge
Electron Cloud
Subatomic Particle:
Electron –
mass = 0 amu
negative charge
orbits the nucleus
Ions
+
cation
An atom with an electrical charge
Ions
-
anion
Isotopes
Different number of neutrons = different mass
Isotope Designation
Carbon - 12
Atomic Number, Mass # and Atomic Mass
Atomic Number
Atomic Mass
Mass Number = 59
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