BIO 210 CORE MAIN ALL QUESTIONS AND
ANSWERS SURE A+
✔✔There are three isotopes of the element carbon (C). 12C is the most common, 13C
is a stable isotope, while 14C is an unstable, radioisotope. Which atomic mass is
closest to the mass for carbon found in the periodic table - ✔✔Carbon 12 (12C)
✔✔Electrons found closer to the nucleus of an atom have which, a higher or lower
energy, than electrons found farther from that nucleus - ✔✔higher energy
✔✔What is the predicted valence of an atom with 4 electrons in its outermost energy
shell - ✔✔4
✔✔If the valence of a nitrogen atom is 3, how many covalent bonds can nitrogen
typically form - ✔✔3 bonds
✔✔Nam the three chemical bonds you have to know for this course - ✔✔1. Covalent
bonds
2. Ionic bonds
3. Hydrogen bonds
✔✔Which chemical bond involves sharing pairs of electrons between atoms -
✔✔Covalent bonds
✔✔Which chemical bond results from partially positive and partially negative parts of a
molecule interacting with partially negative or positive, respectively, parts of another
molecule - ✔✔Hydrogen bonds
✔✔Which chemical bond is the strongest - ✔✔Covalent bonds
✔✔Which chemical bond is the weakest - ✔✔Van der Waals Forces
(ionic and hydrogen bonds from the 3 needed to know)
, ✔✔What is the difference in energy between an ionic bond and a hydrogen bond -
✔✔Their bond energy is the same 3-7 kcal/mol
✔✔Which chemical bond results from the opposite charges of positive and negatively
charged ions attracting each other - ✔✔Ionic bonds
✔✔Comparison of the properties of H2S and H2Te predict H2O will be liquid over an 11
degree range. What property of H2O molecules is invoked to rationalize the 100 degree
range for liquid water - ✔✔Hydrogen bonds
✔✔When water molecules surround a negatively charged chloride ion (Cl-), what
portion of the molecule is oriented toward the ion - ✔✔The hydrogen atoms (H+)
✔✔The spacing of the 4 covalent bonds in carbon atoms results in carbon-containing,
or organic, molecules having distinct shapes. What role does the shape play in
molecular recognition - ✔✔It shows what orbitals are being used and how a molecule is
bonded
✔✔Draw the general structure for an aldehyde - ✔✔
✔✔Draw the general structure for a ketone - ✔✔
✔✔Draw the general structure for a carboxyl group - ✔✔
✔✔Draw the ionized structure of a carboxyl group - ✔✔RCOO-
✔✔Draw the portion of the functional group that is common to aldehydes, ketones, and
carboxylic acids - ✔✔R-C=O
✔✔Draw a neutral amine group - ✔✔
✔✔Draw a charged amine group - ✔✔RCNH3
✔✔This recreational molecule, CH3CH2-OH, is an example of what kind of functional
group - ✔✔Alcohol
✔✔Draw the general structure for a sulfhydryl group (Thiol) - ✔✔
✔✔What bond forms when two sulfhydryl groups are oxidized - ✔✔Disulfide bonds
✔✔What atom is at the center of a phosphate molecule - ✔✔Phosphate
ANSWERS SURE A+
✔✔There are three isotopes of the element carbon (C). 12C is the most common, 13C
is a stable isotope, while 14C is an unstable, radioisotope. Which atomic mass is
closest to the mass for carbon found in the periodic table - ✔✔Carbon 12 (12C)
✔✔Electrons found closer to the nucleus of an atom have which, a higher or lower
energy, than electrons found farther from that nucleus - ✔✔higher energy
✔✔What is the predicted valence of an atom with 4 electrons in its outermost energy
shell - ✔✔4
✔✔If the valence of a nitrogen atom is 3, how many covalent bonds can nitrogen
typically form - ✔✔3 bonds
✔✔Nam the three chemical bonds you have to know for this course - ✔✔1. Covalent
bonds
2. Ionic bonds
3. Hydrogen bonds
✔✔Which chemical bond involves sharing pairs of electrons between atoms -
✔✔Covalent bonds
✔✔Which chemical bond results from partially positive and partially negative parts of a
molecule interacting with partially negative or positive, respectively, parts of another
molecule - ✔✔Hydrogen bonds
✔✔Which chemical bond is the strongest - ✔✔Covalent bonds
✔✔Which chemical bond is the weakest - ✔✔Van der Waals Forces
(ionic and hydrogen bonds from the 3 needed to know)
, ✔✔What is the difference in energy between an ionic bond and a hydrogen bond -
✔✔Their bond energy is the same 3-7 kcal/mol
✔✔Which chemical bond results from the opposite charges of positive and negatively
charged ions attracting each other - ✔✔Ionic bonds
✔✔Comparison of the properties of H2S and H2Te predict H2O will be liquid over an 11
degree range. What property of H2O molecules is invoked to rationalize the 100 degree
range for liquid water - ✔✔Hydrogen bonds
✔✔When water molecules surround a negatively charged chloride ion (Cl-), what
portion of the molecule is oriented toward the ion - ✔✔The hydrogen atoms (H+)
✔✔The spacing of the 4 covalent bonds in carbon atoms results in carbon-containing,
or organic, molecules having distinct shapes. What role does the shape play in
molecular recognition - ✔✔It shows what orbitals are being used and how a molecule is
bonded
✔✔Draw the general structure for an aldehyde - ✔✔
✔✔Draw the general structure for a ketone - ✔✔
✔✔Draw the general structure for a carboxyl group - ✔✔
✔✔Draw the ionized structure of a carboxyl group - ✔✔RCOO-
✔✔Draw the portion of the functional group that is common to aldehydes, ketones, and
carboxylic acids - ✔✔R-C=O
✔✔Draw a neutral amine group - ✔✔
✔✔Draw a charged amine group - ✔✔RCNH3
✔✔This recreational molecule, CH3CH2-OH, is an example of what kind of functional
group - ✔✔Alcohol
✔✔Draw the general structure for a sulfhydryl group (Thiol) - ✔✔
✔✔What bond forms when two sulfhydryl groups are oxidized - ✔✔Disulfide bonds
✔✔What atom is at the center of a phosphate molecule - ✔✔Phosphate
