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Atomic Structure Chm 1.1.1
Matter
Matter
Mixtures Pure Substances
Compounds
Elements that are CHEMICALLY bonded togetherCan’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
NucleusSubatomic Particles:
Proton – mass = 1amupositive charge
Neutron – mass = 1amuno charge
Electron Cloud
Subatomic Particle:
Electron – mass = 0 amunegative chargeorbits the nucleus
Ions +
An atom with an electrical charge
cation
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