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Chemistry
Basic chemistry
Question | Answer |
---|---|
atom | basic unit of a chemical element |
proton | a positively charged subatomic particle in the nucleus of an atom |
electron | a negatively charged subatomic particle located in the orbitals around an atoms nucleus |
neutron | a neutral ( no charge) charged subatomic particle in the nucleus of an atom |
atomic number | the number of protons in the nucleus of an atom |
atomic mass number | the total number of protons and neutrons in the nucleus of an atom |
nucleus | the center of an atom; made up of protons and neutrons |
orbital | a region in an atom where there is a high probability of finding electrons |
group | a vertical column of elements in the periodic table; also called a family |
period | a horizontal row of elements in the periodic table |
valence electron | an electron in the outermost energy level of an atom |
ion | an atom or molecule with an electric charge due to the loss or gain of one or more electrons |
noble gases | the unreactive gaseous elements located in Group 18 of the periodic table |
ionization | the process of adding electrons to or removing electrons from an atom or group of atoms |