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Related Flashcards
Cards In This Set
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ATOMS ARE COMPOSED OF...
A-protons with a positive charge B-neautrons no charge C-electrons with a negative charge D-all of the above |
D- all of the above
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A SUBSTANCE THAT IS COMPOSED OF ONLY ONE TYPE OF ATOM IS CALLED A(N)...
A-nucleus B-cell C-atoms D-carbon |
C-element
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ALL MATTER IN THE UNIVERSE IS COMPOSED OF...
A-cells B-molecules C-atoms D-carbon |
C-atoms
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THE ELECTRONS OF AN ATOM...
A-are found in the nucleus along with the protons B-orbit the nuclues in various energy levels C-have a positive charge D-are attracted to the positive charge of neutrons |
B-orbit the nucleusin various energy levels
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ATOMS THAT HAVE GAINED ENERGY...
A-have protons and neutrons that move farther apart B-lose neutrons from the nucleus C-have electrons that move to higher energy levels D-absorb electrons into the nucleus |
C-have electrons that moce to higher energy levels
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WHICH OF THE FOLLOWING STATES OF MATTER CONTAIN(S) PARTICLES THAT ARE TIGHTLY LINKED TOGETHER IN A DEFINITE SHAPE?
A-solid B-liquid C-gas D-solid and liquid |
A-solid
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BECAUSE CARBON HAS FOUR ELECTRONS IN ITS OUTER ENERGY LEVEL...
A-it can form bonds with carbon atoms only B-these atoms are naturally chemically stable C-it can react with up to four other atoms to form covalent bonds D-it cannot react with anything other than organic molecules |
C-it can react with up to four other atoms to form covalent bonds
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THE BOND FORMED WHEN TWO ATOMS SHARE A PAIR OF ELECTRONS IS CALLED A...
A-hydrogen bond B-nonpolar bond C-covalent bond D-water bond |
C-covalent bond
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AN ATOMS THAT HAS GAINED OR LOST ELECTRONS IS CALLED A(N)...
A-molecule B-nucleon C-ion D-element |
C-ion
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WHICH OF THE FOLLOWING STATEMENTS MOST ACCURATLEY DESCRIBES THE DIFFERENCE BETWEEN AN IONIC BOND AND A COVALENT BOND?
A-atoms held together by ionic bonds seperate when placed in water, while atoms held together by covalent bonds do not seperate in water B-ionic bonds hold together atomsof two different types, while covalent bonds hold together atoms of the same type C-electrons are exchanged between atoms held together by an ionic bond, but they are shared between atoms held together by a covalent bond D-ionic bonds form between atoms that carry opposite charges, while covalent bond form between uncharged atoms |
C-electrons are exchanged between atoms held together by an ionic bond, but they are shared between atoms held together by a covalent bond
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 REACTION THREE IN THE GRAPH... A-probably occured in the prescence of a catalyst B-requires a greater activation energy that reaction 2 C-is the same as reaction 1, but faster D-takes longer than reaction 2 |
A-probably occured in the prescence of a catalyst
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 WHICH OF THESE STATEMENTS REGARDING THE GRAPH IS TRUE? A-reaction 2 occurs faster than reaction 3 because reaction 2 requires more energy than reaction 3 B-the difference in the graphs shown for reaction 2 and reaction 3 is due to a difference in the activation energy needed for these reactions C-reactant X contains more energy at the beginninf of the reaction than product Z has after the reaction D-all of the above |
B- the difference in the graphs shown for reaction 2 and reaction 3 is due to a difference in the activation energy needed for these reactions
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CHANGING THE COURSE OR PATHWAY OF A CHEMICAL REACTION SO THAT IT REQUIRES LESS ACTIVATION ENERGY...
A-is a violation of the laws of nature B-requires higher temperatures than those found with in cells C-occurs only when reactants are quickly added to the reaction mixture D-is accomplished by the action of catalysts on reactants |
D-is accomplished by the action of catalysts on reactants
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ENZYMES...
A-are able to heat up molecules so that they can react B-provide CO2 for chemical reactions C-are biological catalysts D-absorb excess heat so that reactions occur at low temperatures |
C-are biological catalysts
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A SINGLE ORGANISM MAY CONTAIN...
A-thousands of different enzymes, each one specific to a different chemical reaction B-one enzyme that plays a role in thousands of different chemical reactions C-approximately 100 kinda of enzymes, each one specific to a different chemical reaction D-one enzyme that is specific to photosynthesis and one enzyme specific to cellular respiration |
A-thousands of different enzymes, each one specific to a different chemical reaction
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