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10 Cards in this Set
- Front
- Back
An atom's nucleus is composed of ___________. |
Protons and neutrons |
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The second electron shell is considered to be full when it contains _____ electrons. |
8 |
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Most biological molecules are joined by ____________. |
covalent bonds |
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What allows one atom to physically interact with a second atom? |
number of electrons in outermost cell |
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A buffer, such as bicarbonate in the blood, _______. |
both accepts and releases hydrogen ions (H+) in response to changes in concentration in order to maintain a constant pH. |
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The electrical attraction between positively and negatively charged ions forms a(n) __________. |
ionic bond |
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The smallest units of matter that still retain the characteristics of an element are called ________. |
atoms |
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What kind of bond holds the atoms within a single water molecule together? |
polar covalent |
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A solution with neutral pH __________. |
Has equal amounts of H+ and OH- |
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Imagine that you have been hired as a research scientist and your first task is to examine a newly discovered atom. The paperwork you are given states that its atomic number is 110. What does this mean? |
the atom contains 110 protons |