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The Atom
Term | Definition |
---|---|
Atom | Is the smallest particle that that still can be considered an element. |
Energy Level | A region of an atom in which electrons of the same energy are likely to be found |
Neutron | A small particle in the nucleus of the atom with no electrical charge |
Atomic Number | The number of protons in the nucleus of an atom |
Isotopes | An atom with the same number of protons and a different number of neutrons from other atoms of the same element |
Mass Number | The sum of protons and neutrons in the nucleus of an atom |
Atomic Mass | The average mass of all the isotopes of an element |
Electrons | A tiny negatively charge particle that moves around the outside of the nucleus of an atom |
Nuclues | In cells a large oval organelle that contains the cells genetic material in the form of DNA and controls many of the cells activities |
Protons | Sm |
Periodic Table | An arrangement of the elements showing the repeating patterns of their properties |
Chemical Symbol | A one-or Two -letter representation of an element |
Periods | A horizontal row of elements in the periodic table |
Group | Elements in the same vertical column of the periodic table |