click below
click below
Normal Size Small Size show me how
The atom
| Term | Definition |
|---|---|
| Atom | the smallest particle that still can be considered an element |
| Electrons | negatively charged particles |
| Nucleus | the center of an atom |
| Proton | positively charged particles |
| Energy level | The specific amount of energy an electron has |
| Neutron | a particle with no charge |
| Atomic number | the number of protons in the nucleus of an atom |
| Isotopes | atoms with the same amount of protons and different amounts of neutrons |
| Mass number | the sum of protons and neutrons in the atom |
| Atomic mass | the average mass of all the isotopes in that element |
| Periodic table | an arrangement of elements showing the repeating pattern of their properties |
| Chemical symbol | the letter under an atomic number |
| Periods | the rows in a periodic table |
| Group | the elements in a collumn |