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Chapter 6 Substances
8th : physical science
Question | Answer |
---|---|
define mixture | formed when different substances combine and no chemical reaction occurs |
define compound | formed when different substances combine, a chemical reaction occurs, and new compounds are formed |
draw the substances family tree | substances---pure substances---elements & compounds substances---mixtures---homogeneous (solution) & heterogeneous |
example of an element | anything on periodic table |
example of compound | H2O (water) NH3 (ammonia) CO2 (carbon dioxide) SO2 (sulfur dioxide) C3H8 (propane) CH4 (methane) |
example of homogeneous mixture | also called solution : gatorade, salt water, vinegar, kool-aid, coffee with sugar, etc. |
example of heterogeneous mixture | garden soil, seasoning mix, sand, chicken noodle soup, toy box filled with toys, etc. |
what is crystal lattice | the geometric arrangement in which atoms join together to form crystals. The atoms in a crystal lattice are held together by electrical attraction in a regular, repeating pattern. |
two configurations atoms take when bonding with other atoms | molecules & crystals |
example of molecular substance and one important fact about it | anything on pages 100 and 101 |
the identity of elements is determined by | # of protons in the atoms nuclei |
what is an isotope? | varying # of neutrons within a given element |
what is a solute and a solvent and how do you tell the difference between them? | components of a solution...solute-less of, solvent-more of |