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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. |