Test 1-BIO 210 EXAM LATEST
QUESTIONS AND VERIFIED
CORRECT ANSWERS
GRADED A+
formula to find number of neutrons - CORRECT ANSWER-Atomic mass -MINUS- Atomic
number (protons)
molecule - CORRECT ANSWER-two or more atoms bonded together
compound - CORRECT ANSWER-two or more different kinds of atoms bonded together
3 types of mixtures - CORRECT ANSWER-Solutions-salt water (evenly mixed)
Colloids-jello (an emulsion-particles do not settle out)
Suspensions-blood/itailian dressing (particles settle out)
Solvent - CORRECT ANSWER-present in greatest amount (usually a liquid)
Solute - CORRECT ANSWER-present in smaller amounts (whatever is dissolved)
,Octet rule - CORRECT ANSWER-except for the first shell which is full with 2 electrons,
atoms interact in a manner to have 8 electrons in their outermost energy level (valance shell)
3 Chemical Bonds & strengths - CORRECT ANSWER--Ionic...weaker than covalent, but
stronger than hydrogen
-Covalent...strongest
-Hydrogen....weakest
Anion - CORRECT ANSWER-negatively charged ion (has gained one or more electron)
Cation - CORRECT ANSWER-positively charged ion (has lost one or more electron,
resulting in more protons than electrons)
Covalent Bonds - CORRECT ANSWER--share electrons with other atoms
-always have to stay together to stay stable
-sharing may be equal or unequal
-equal sharing creates a =non-polar molecule
-electrically neutral and unequal produces =polar molecules with opposite charges
endergonic - CORRECT ANSWER-reaction that stores energy, products have more energy
than the reactants
exergonic - CORRECT ANSWER-chemical reaction that releases some form of energy, such
as light or heat.
, endothermic - CORRECT ANSWER-describes a reaction that absorbs energy from the
surroundings
exothermic - CORRECT ANSWER-of a chemical reaction or compound) occurring or
formed with evolution of heat
what factors can increase the rate of a chemical reaction - CORRECT ANSWER-increased
temperature
decreased particle size
increased concentration of reactant
catalysts=increase rate without being chemically changed...an enzyme that makes a reaction
faster
synthesis (combination) reactions - CORRECT ANSWER-= (anabolic) building reation
A+B->AB
decomposition reactions - CORRECT ANSWER-=break apart exchange ( catabolic)
AB->A+B
Exchange reactions - CORRECT ANSWER-involve both synthesis and decomposition
reactions
Bonds are both made and broken
chemical reaction - CORRECT ANSWER-a process in which one or more substances are
changed into others
QUESTIONS AND VERIFIED
CORRECT ANSWERS
GRADED A+
formula to find number of neutrons - CORRECT ANSWER-Atomic mass -MINUS- Atomic
number (protons)
molecule - CORRECT ANSWER-two or more atoms bonded together
compound - CORRECT ANSWER-two or more different kinds of atoms bonded together
3 types of mixtures - CORRECT ANSWER-Solutions-salt water (evenly mixed)
Colloids-jello (an emulsion-particles do not settle out)
Suspensions-blood/itailian dressing (particles settle out)
Solvent - CORRECT ANSWER-present in greatest amount (usually a liquid)
Solute - CORRECT ANSWER-present in smaller amounts (whatever is dissolved)
,Octet rule - CORRECT ANSWER-except for the first shell which is full with 2 electrons,
atoms interact in a manner to have 8 electrons in their outermost energy level (valance shell)
3 Chemical Bonds & strengths - CORRECT ANSWER--Ionic...weaker than covalent, but
stronger than hydrogen
-Covalent...strongest
-Hydrogen....weakest
Anion - CORRECT ANSWER-negatively charged ion (has gained one or more electron)
Cation - CORRECT ANSWER-positively charged ion (has lost one or more electron,
resulting in more protons than electrons)
Covalent Bonds - CORRECT ANSWER--share electrons with other atoms
-always have to stay together to stay stable
-sharing may be equal or unequal
-equal sharing creates a =non-polar molecule
-electrically neutral and unequal produces =polar molecules with opposite charges
endergonic - CORRECT ANSWER-reaction that stores energy, products have more energy
than the reactants
exergonic - CORRECT ANSWER-chemical reaction that releases some form of energy, such
as light or heat.
, endothermic - CORRECT ANSWER-describes a reaction that absorbs energy from the
surroundings
exothermic - CORRECT ANSWER-of a chemical reaction or compound) occurring or
formed with evolution of heat
what factors can increase the rate of a chemical reaction - CORRECT ANSWER-increased
temperature
decreased particle size
increased concentration of reactant
catalysts=increase rate without being chemically changed...an enzyme that makes a reaction
faster
synthesis (combination) reactions - CORRECT ANSWER-= (anabolic) building reation
A+B->AB
decomposition reactions - CORRECT ANSWER-=break apart exchange ( catabolic)
AB->A+B
Exchange reactions - CORRECT ANSWER-involve both synthesis and decomposition
reactions
Bonds are both made and broken
chemical reaction - CORRECT ANSWER-a process in which one or more substances are
changed into others
