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Stack #93549
| Question | Answer |
|---|---|
| crytal lattice | a reapeatg three-demintional pattern. |
| ionic bond | the force of attraction between oppositely charged ions. |
| chemical bond | the force of attraction that holds two atoms together. |
| ion | charged particles that form during chemical changes. |
| ionic compound | compounds that contain ionic compounds. |
| covalent bond | the force of attraction between two nuclei of atoms where the electrons are shared by the atoms. |
| noble gases | the elements of Group 18 of the periodic table; unreactive nonmetals; 8 valence electrons. |
| halogens | elements of Group 17; very reactive nonmetals; valence electrons. |
| Allkaline-earth metals | the elements of Group; they are very reactive metals but are less reactivdee than alkali metals; 2 valence electrons. |
| alkial metals | the elements of Group 1; they are the most reactve metals; 1 valence electron. |
| compounds | a pure substance composed of two o more elements that are combined. |
| energy levels | regions around the nucleus of an atom. |
| valence electrons | the electrons on the outermost energy level of an atom. |
| temperature | a measure of how hot or cold somethig is. |
| density | the amount of matter in a given space or volume; the mass per unit volume of a substance. |
| mass | the amount of matter something is made up of. |
| volume | the amount of space something occupies |
| area | the measure of how mucn surface area an object has. |
| meter | the basic SI unit of length. |