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20 Cards in this Set
- Front
- Back
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What is the science of structure & interactions of matter?
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-Chemistry
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Anything that occupies space is known as?
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-Matter
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What are the 4 major elements making up 96% of body's mass?
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-C - Carbon
-H - Hydrogen -O - Oxygen -N - Nitrogen |
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What are the 4 lesser elements of the body's mass?
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-Ca - Calcium (bones)
-K - Potassium (muscular & neuro) -Na - Sodium -Fe - Iron (blood) |
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The smallest unit of matter?
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-Atom
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What are the 2 basic parts of an atom?
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-Nucleus - (core) Protons (p+) & Neutrons (n )
-Electrons - (e-) surround nucleus in shells |
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The number of protons in nucleus is known as?
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-Atomic number
*Protons do not change |
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What is the outer most electron shell?
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-Valence Shell
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When does an atom have a zero charge?
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-When the # protons = # electrons
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How many electrons do most atoms prefer in the valence shell and what is the name of the rule for this?
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-Octet Rule = 8 electrons
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Forces that hold atoms together?
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-Chemical Bonds
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If an atom either gives up or gains electrons, what does it become?
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-Ions
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Positively charged ions; lost electron(s)?
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-Cations
*Hint - t=+ positive |
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Negatively charged ions; gained electron(s)?
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-Anions
*Hint - n=negative |
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What is the strongest & most common type of bond?
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-Covalent Bonds
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Atoms in molecules sharing 1,2 or 3 pairs of electrons is known as what type of bond?
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-Covalent Bond
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The force of attraction athat hold together oppositely charged ions is what type of bond?
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-Ionic Bond
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What is it called when 2 or more atoms share electrons?
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-Molecule
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What is an atom that has a positive or negative chare due to unequal numbers of protons and electrons?
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-Ion
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The number and type of atoms that make up a molecule is known as a ___________ ____________.
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-Molecular Formula
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