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Stack #4593640
| Question | Answer |
|---|---|
| atom | smallest piece of an element that still represents the element |
| electron | a particle with on negative charge |
| proton | an atomic particle that has one atomic that has one positive charge |
| neutron | neutral particle the exists in the nucleus of an atom |
| electron cloud | an area around an atomic nucleus where an electron is most likely to be located |
| atomic number | the number of protons in an atom of an element |
| ion | an atom that is no longer neutral because it has lost or gained electrons |
| isotopes | atoms of the same element that have different numbers of neutrons |
| mass number | sum of protons and neutrons in an atom |
| group | column on the periodic table |
| period | row on the periodic table |
| periodic table | chart of the elements arranged into rows or columns according to their physical and chemical properties |
| alkaline metal | elements in group 1 |
| alkaline earth metal | elements in group 2 |
| ductility | ability to be pulled into thin wires |
| luster | describes the ability of a metal to reflect light |
| malleability | ability of a substance to be hammered or rolled into thin sheets |
| metal | good conductor of heat, generally shiny, and can be pulled into wires or hammered into sheets |
| transition element | element in group 3-12 |
| halogen | element in group 17 |
| metalliod | element that has physical and chemical properties of both metals and nonmetals |
| noble gas | elements in group18 |
| nonmetal | elements that have not metallic properties |
| semiconductor | conducts electricity at high temps, but not a low temp |
| chemical bond | force that holds 2 or more atoms together |
| valence electrons | electrons on the outermost ring of a nucleus |
| electron dot diagram | diagram to show how many valence electrons an element has |
| covalent bond | chem bond formed when 2 atoms share one valence electron |
| molecule | group of atoms held together by covalent bonding |
| polar molecule | molecule that has a partial positive and a partial negative charge |
| chem formula | a group of chem symbols that represents the number of atoms each element that make a compound |
| ionic bond | attraction between positively and negatively charged ions in an ionic compound |
| metallic bond | bond formed when many metal atoms share their pooled valence electrons |
| bond | force that holds atoms together in a coumpound |
| compound | substance made up of 2 or more different elements |
| conduction | transfer of thermal energy due to collision between particles |