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atom
Term | Definition |
---|---|
Atom | Is the smallest particle that still can be considered an element. |
Electrons | Negatively charged particles |
Nucleus | A small region in its center |
Protons | Positively changed particles in an atom's nucleus |
Energy level | The specific amount of energy it has |
Neutron | Hard to find because it has no electric charge |
Atomic number | Atom's elements |
Isotopes | Atoms with the same # of protons and different # of neutrons |
Mass number | Sum of protons and neutrons in the atom |
Atomoic mass | An element is the average mass of all the isotopes of that element |
Chemical symbol | Potassium |
Periodic table | An arrangement of elements showing the repeating pattern of their properties |
Periods | Periodic table is arranged in a row |
Group | The elements in a column |