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Atomic structure

Key words ch29-30

Terms Definitions
Atom Smallest particle of an element that still retains the particles of that element .
Proton Positive charge
Electron Negative charge
Neutron Nuteral
Atomic mass unit
Sub atomic particles
Planetary model
Atomic number Sum of protons and neutrons in an atom .
Atomic mass
N= number Shows the number of shells / rings .
Group Groups tougether the elements with similar chemical properties .
Period Line on a periodic table going across .
Alikali metals Group one very explosive 1 shell
Aliki earth metals Group two 2 shells
Halogens Group 3
Noble gasses Dont do much .
Periodic table An arrangements of elements in order of increasing atomic number .
Isotopes Atoms of the same element that have different numbers of neutrons in the nuclease .
Mendeleev Invented periodic table .
Dalton Founded Atomic structure .
Neil's Bohr Founded Planetary model of atom.
Created by: Shasow
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