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| A substance made up of two or more elements that are held together by a chemical bond are called |
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| The force of attraction that holds atoms together by transferring or sharing valence electrons |
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A short way to show the ratio of atoms in chemical reaction using symbols.
Reactants produces products |
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| A chemical bond between two oppositely charged ions (metals which lose e- and non-metals which gain e-) |
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| An atom (or group of atoms) that obtains an electric charge by losing or gaining valence electrons |
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| An ion made up of one atom (CL- & NA+) |
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| An ion made up of more than one atom, but can be treated as one ion (OH-) |
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| Atoms want to have their outer most energy shell completely filled by gaining or losing electrons. This will result in the atoms having an electric charge. |
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What comes first the positive or negative ion? |
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| All ionic bonds are solids at... |
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| room temperature and have high melting points |
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| Ionic bonds can conduct........... if its melted or dissolved because then the ...... are able to flow easliy |
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| Ionic bonds and covalent bonds both can form a.... |
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| Electrons that are in the shell farthest from the nucleus which are held the weakest and are involved in chemical reactions |
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| Elements in the same group have the same number of valence electrons. The number of the valence electrons across a period increases by one |
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| An atom that gains electrons has more ......... than ....... so the ion has a negative charge |
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| An atom that loses..... is left with more.......... so the ion has a positive charge |
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| A chemical bond between two non-metals by sharing valence electrons to become stable |
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| The sharing of one pair of electrons |
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The sharing of two pairs of electrons
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The sharing of there pairs of electrons
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| A covalent molecule made up of two atoms of the same element |
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| Most covalent molecules are... |
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| gases at room temperature |
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| No free electrons so covalent molecules do not.. |
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| Most covalent and ionic bonds have a .... |
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| Covalent molecules do not.. |
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