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| The electrons that are in the highest energy level of an atom and that are involved in chemical reactions. |
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A representation of the valence electrons in an atom, using dots. [image][image][image][image][image][image] |
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The force that holds atoms together. Atoms are either shared or transfered between 2 atoms |
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| A chart of the elements showing the repeating patten of their properties |
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| A Horizontal row on the Chart |
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| PT is aranged horizontaly in order of_______ |
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| increasing atomic number(number of protons) |
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| Elements in the same PT column |
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Elements w/ in a Group have the same _______
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| ___________ increases as you move across the periods. |
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inert gasses Name 3 facts |
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- group18
- 8 valence electons
- stable unlikely to transfer
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- group 1
- 1 valence
- react by loosing there electon
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- 2-12
- React by loosing there electron
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- green portion of the chart
- react by gaining
- 4 electrons
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- zig zag line
- gain or loose
- 3-6 valence
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- above group one
- reactive
- one valance
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Term
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Definition
| -An atom or group of atoms that has become electrically charged- |
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Definition
| an ion that is made of more that one atom |
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| the attraction between oppitely charged ions |
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| A compound that consists of + and - ions |
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| a combination of symbols(symbols) that repersents the elements in a compound &their proportions |
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| a number in a chemical formula that tells the number of atoms in the molecule or the ratio of elements in a compound |
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| an orderly 3demention pattern of ions or atoms in a solid |
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A chemical bond formed when 2 atoms share electrons
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| a neutral particle made of two or more atoms joined by covalent bonds |
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| A chemical bond formed when atons share 2 pairs of electrons |
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A compound that is composed of molecules componnd |
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triple bonds triple bonds triple bonds 1....2....3 |
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Definition
| A chenical bond formed when atoms share 3 pairs of electrons |
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| a covalent bond which electrons are shared unequally |
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| a covalent bond in which electrons are shared |
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| a mixture of 2 or more elements 1 of which is metal |
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| Are Alloys stronger or weeker than pure metals? |
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| Are Alloys more reactive or less reavtive than pure metals? |
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True or false? metal atoms combine in regular patterns in which the valence electons are NOT free to move about? |
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| ~WHAT IS A METALIC BOND?~ |
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| An attraction between a positive metal ion and the electrons surrounding it. |
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| name 4 matallic properties........ |
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Definition
Maleability Ductility Luster Electrical and thermal conductivity |
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| what is a physical property? |
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| a chericteristic of substance that can be observed with out changing the subtace into another substance |
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whats a CHEMICAL property?
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| a characteristic of a substinice that desribes its ability to change into other subtance |
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| The study of matter and how matter changes |
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| is anything that has mass and takes up space |
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| is anychange that alters the form or the apperiance |
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| A change in matter that produces 1 or more new substance |
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the that under goes change in a chemical reaciton
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| that during chemical reation matter is neither created or destroied |
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matter an go and leave at any time |
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matter isnt allowed to o or enter
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| the number placed in front of a chemical raction |
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| the reaction of hydrogen&oxygen to make water |
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| It occurs then compunds break down into simpler products |
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| the last step to classifying chemical reactions |
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Definition
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| what is activantion energy? |
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Definition
| the min. amount of energy needed to start a chemical reaction |
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| is the amount of a substance in a given volume |
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| is a material that increases the rate if a reaction |
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| THE cells IN your BODY contain BIOLOGICAL catalysts |
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| a material used to work by preventing the rate of a reaction |
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a rapid reaction between fuel and oxygen
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a material that releases energy when it burns
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