unit 4
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| chemical equation | The way of expressing the chemical reaction of two or more compounds.
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| chemical formula |
The way of expressing the atoms in a compound.
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| inorganic compounds |
Compounds without carbon.
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| organic compounds | Compounds that contain carbon.
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| nonpolar bonds |
A nonpolar bond is a covalent bond between two nonmetal atoms where the electrons forming the bond are equally distributed. Therefore, the molecule has a zero charge.
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| polar bond |
A polar bond is a covalent bond between two nonmetal atoms where the electrons forming the bond are unequally distributed. Therefore, one part of molecule is positive and the other negative. Ex. water
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| molecular compound |
A compound with covalent bonds. Same as a covalent compound.
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| diatomic elements | The elements ending with "-gen" including halogens form diatomic molecules.
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| covalent bonds |
sharing electrons
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| ionic bonds |
gaining or losing electrons
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| valence electron |
electrons on the outer rim
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| isotope | each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons
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| ion |
an atom or molecule with a net electric charge due to the loss or gain of one or more electrons
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| reacants | a substance that takes part in and undergoes change during a reaction.
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| products | an article or substance that is manufactured or refined for sale:
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| coefficients | a multiplier or factor that measures some property:
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| exothermic reaction |
Exothermic reactions give off heat (product). It gives off heat to its surrounding (the water). The extra heat makes the solution hotter and so temperature goes UP.
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| endothermic reaction |
Endothermic reactions require heat to proceed. The heat that they use up comes from the solution. Since heat is being used up, the temperature drops.
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| acid | a molecule or other entity that can donate a proton or accept an electron pair in reactions.
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| base | have as the foundation for (something); use as a point from which (something) can develop:
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| pH scale | The pH scale measures how acidic or basic a substance is.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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