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Atomic structure
This is a set of keywords from chapter 29 & 30
Term | Definition |
---|---|
Atom | An atom is the smallest particle of an element which still retains the properties |
Proton | A positive charge |
Electron | A negative charge |
Neutron | A neutral charge |
Atomic mass unit | Is the measurement of the mass of the atom |
Sub-atomic particles | Are particles smaller then than atoms |
Planetary model | All electrons orbit the nucleus |
Atomic number | A number of protons found in a nucleus |
Atomic mass | The weight if the atom |
N = number | Number of electrons on the outer shell |
Group | The vertical columns of the periodic table |
Period | The horizontal rows |
Alkali metals | They are base metals |
Alkaline earth metals | Metal that normally has a charge of +2 |
Halogens | Electronegative elements |
Nobel gases | Unreactive elements |
Periodic table | A table with all the elements |
Isotopes | Isotopes are atoms of the same element but have different numbers of neutrons |
Mendeleev | Found the periodic table |
Dalton | Found the atoms |
Neil's Bohr | Found planetary model |