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16 Cards in this Set
- Front
- Back
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element
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all atoms alike
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compound
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more than 1 kind of atom, all molecules alike
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mixture
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more than 1 kind of molecule
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physical change
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the molecules and atoms dont change
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chemical change
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molecules break apart; atoms rearrange into new molecules
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mole
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the quantity of a substance that contains (Avogodro's number) formula units
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molecule
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smallest particle of a substance that retains the structure and composition of that substance
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atom
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smallest particle in an element that retains the identity of the element
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atomic number
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number of protons in one atom of the element
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atomic weight
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average weight of one atom of the element in amu's and weight in grams of 1 more of the element
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mass number
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sum of number of protons and neutrons
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empirical formula
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the smallest whole number ratio of each type of atom
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period of elements
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a horizontal row of elements on the periodic table
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group/family of elements
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vertical column of elements on teh periodic table
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isotope
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same number of protons, different number of neutrons
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What are the functions of the zona pellucida? (4)
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Prevents polyspermy
prevents premature implantation prevents two zygotes from sticking together keeps blastomeres together until compaction |
