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41 Cards in this Set
- Front
- Back
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MATTER |
Anything that has mass and takes up space |
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MASS |
Measure of matter in an object |
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ATOM |
Building blocks of matter, very tiny |
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PROTON |
POSITIVELY charged particle found in the nucleus |
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NEUTRON |
Particle with NO CHARGE found in nucleus |
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ELECTRON |
NEGATIVELY charged particle orbiting the nucleus |
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ELEMENT |
A substance that can NOT be separated into smaller substances |
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PURE SUBSTANCE |
A sample of matter, either a single element or single compound that has definite physical or chemical properties. |
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COMPOUND |
A substance made of two or more different elements joined by chemical bonds |
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MIXTURE |
A combination of two or more substances that are not chemically combined |
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PHYSICAL SEPARATION |
The ways to separate a mixture by filtration, sifting, and evaporation |
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HOMOGENEOUS |
Mixture that is mixed evenly throughout and cannot be visibly distinguished |
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HETEROGENEOUS |
Mixture that is not uniform throughout |
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ATOMIC NUMBER |
Number assigned to each kind of atom; it represents the number of protons in an atom |
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ATOMIC MASS |
The average mass of the atoms in an element; the number of protons is equal to the number of electrons in an element |
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SHELLS/ORBITALS/ENERGY LEVELS |
The region around the nucleus of an atom where electrons are found |
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PERIODIC TABLE |
A table that shows all of the atoms that everything in the known universe is made form; each box contains info about each element |
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GROUP |
The vertical columns on the periodic table; elements in the same group share the same properties |
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PERIOD |
Horizontal rows on the periodic table; tells how many energy levels |
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MENELEEV |
A Russian chemist who discovered a pattern to the elements |
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METAL |
An element that is shiny and that conducts heat and electricity well |
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NON-METAL |
Element that conducts heat and electricity poorly |
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METALLOID |
Element that has properties of metals and non-metals; they can be called semi-conductors |
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ALKALI METALS |
Group 1; very reactive and soft metals |
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ALKALINE EARTH METALS |
Group 2; reactive |
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TRANSITION METALS |
Groups 3-12; not very reactive and good conductors |
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HALOGENS |
Group 17: very reactive non-metals |
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NOBLE GASES |
Group 18: non-reactive, colorlesss, odorless gases |
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CHEMICAL BOND |
An interaction that holds atoms or ions together |
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CHEMICAL PROPERTIES |
A property of matter that describes a substances ability to particitpate in chemical reactions |
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PRECIPITATE |
A solid that is produced as a result of a chemical reaction |
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LAW OF CONSERVATION OF MASS/ENERGY |
Law that states that mass/energy cannot be created or destroyed, only changed or transferred |
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PRODUCT |
A substance that forms in a chemical reaction |
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REACTANT |
A substance or molecule that participate in a chemical reaction |
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CLOSED SYSTEM |
A reaction where nothing is added and nothing escapes |
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YIELD ARROW |
In a chemical reaction, the arrow that separates the product from the reactants |
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SUBSCRIPT |
The number written below and to the right of the symbol in the formula |
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COEFFICIENT |
The number in front of a chemical formula that indicates the number of molecules present |
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ENDOTHERMIC REACTION |
A chemical reaction that requires heat "gets cold" |
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EXOTHERMIC REACTION |
A chemical reaction that releases heat"gets hot" |
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GAS FORMATION |
A sign of a chemical reaction in which gas is produced |
