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Atoms and P Table
Term | Definition |
---|---|
atom | the smallest particle of an element that still retains the properties of the element |
electron | particle with an electric charge of -1, surrounds the nucleus of an atom |
electron cloud | area around the nucleus of an atom where the atom's electrons are most likely to be found |
neutron | electrically neutral particle inside the nucleus of an atom |
nucleus | the small, positively charged center of an atom, contains protons and neutrons. |
proton | particle in the nucleus with an electric charge of +1 |
quark | particle of matter that makes up protons and neutrons |
atomic number | number of proton in an atom's nucleus |
average atomic mass | weighted average mass of an element's isotopes according to their natural abundance |
isotope | atom of an element that has a specific number of neutrons |
mass number | sum of the number of protons and neutrons in an atom's nucleus |
valence electrons | the number of electrons in the outermost energy level of an atom. |
group | vertical column in the periodic table |
period | horizontal row in the periodic table. |