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20 Cards in this Set
- Front
- Back
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H2O |
represents a formula for a chemical compound |
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protons and neutrons |
The inside of an atom contains in its nucleus |
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electron clouds |
electrons move about the nucleus of an atom in regions called_________ _________ |
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Gains an electron |
A chloride ion when it________ |
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13 |
a very strong base might have a pH of what? |
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Isotopes |
Carbon-12, carbon-13, and carbon-14 are_____ |
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45 |
the total number of atoms in a molecule of sucrose,C12H22O11, is________ |
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seven electrons |
an atom of fluorine has nine electrons. Its second energy level has_____ |
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concentration Gradient |
Diffusion continues until there is no______ |
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covalent bond |
the bond formed when two atoms share a pair of electrons is called a________ |
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different parts of the molecules have slightly different charges |
why is water is a polar molecule? |
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acid |
a substance that forms hydrogen ions when dissolved in water is called a(n) |
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one atom transfers its electrons to another atom |
when does an ionic bond forms? |
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stable |
what does water helps keep the temperature of living things? |
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lose these two electrons and become positively charged ion |
an atom that has two electrons in the outer shell would most likely do what? |
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stabilizes temperature inside and outside the molecule |
which of these properties of water is not due to hydrogen bonding between water molecules |
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Acid |
any substance that forms hydrogen ions in water is a(n)________ |
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Convalent |
two atoms that share electrons are held together by______ bonds |
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Compounds |
atoms of two or more elements chemically combined are |
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isatopes |
atoms of the same elements with different numbers of neutrons are________ |
