1) which is most likely true for an atom with six valence electrons?
a.it will gain one electron.
b.it will gain two electrons.
c.it will lose one electron.
d.it will lose two electrons.
2) which of the following occurs when an ionic bond is formed?
a.electrons are transferred from the more electronegative element to the less
electronegative element.
b.electrons are transferred from the less electronegative element to the more
electronegative element.
c.electrons are shared equally.
d.electrons are shared unequally.
3) to use the vsepr model to determine the geometry of a molecule we need to know
which of the following?
a.the number of atoms in the molecule
b.the number of atoms bonded to the central atom
c.the number of lone pairs around the central atom
d.both b and c
4) which of the following is not a proper symbol for an element?
a.c
b.ca
c.co
d.co
5) a diuretic does which of the following?
a.decrease urea productionc.decrease urine production
b.increase urea productiond.increase urine production
6) which of the following products are formed when sodium reacts with water?
a.nah + o2
b.nao + h2
c.na2o + h2
d.naoh + h2
7) the following represents carbonic acid, an important part of the buffer system in
blood.
how many polar bonds are represented in this structure?
a.5
b.3
c.2
d.none of the bonds are polar.
8) when a strong magnet is brought near to a sample which is known to contain both
iron and sulfur the iron and the sulfur are not separated from one another. what type of
material is this sample?
a.a compound
b.a homogeneous mixture
c.a heterogeneous mixture
d.there is insufficient information to answer.
9) which of the following statements describe a mixture?
a.a mixture does not contain a fixed ratio by mass of the component elements.
b.chemical techniques are required to separate the components of a mixture.
c.both a and b
d.neither a nor b
10) the ide ending is usually, but not always, associated with monatomic anions. which
of the following polyatomic ions has a name which ends in ide?
a.c2h3o2
–
b.hpo4
2-
c.oh–
d.so4
2-
11) when we name a molecular binary compound which of the following is true?
a.the element which has more atoms in the molecule is named first.
b.we name the elements in alphabetical order.
c.we name the less electronegative element first.
d.we name the more electronegative element first.
12) which of the following correctly describes a proton?
a.on the scale of subatomic particles it is massive and has a +1 charge
b.on the scale of subatomic particles it is massive and has a 1 charge
c.on the scale of subatomic particles it is light and has a +1 charge
d.on the scale of subatomic particles it is light and has a 1 charge
13) which group of materials accounts for most of the dissolved solids in the plasma?
a.carbohydratesc.proteins
b.dissolved gasesd.wastes
14) what is the correct name for al2(so4)3?
a.dialuminum trisulfate
b.aluminum trisulfate
c.aluminum sulfate
d.aluminum sulfoxide
15) in what form is fluorine administered when it is used to prevent tooth decay?
a.f–
b.f
c.f2
d.f+
16) what are the vertical columns of the periodic table called?
a.families
b.periods
c.either a or b
d.neither a nor b
17) what are the elements in the b columns of the period table called?
a.main group elements
b.inner transition elements
c.metalloids
d.transition elements
18) which of the following is true of the ionization energy of the elements?
a.ionization energy generally decreases as we move left to right and decreases as we
move top to bottom in the periodic table.
b.ionization energy generally decreases as we move left to right and increases as we
move top to bottom in the periodic table.
c.ionization energy generally increases as we move left to right and decreases as we
move top to bottom in the periodic table.
d.ionization energy generally increases as we move left to right and increases as we
move top to bottom in the periodic table.
19) acetylene has the formula c2h2. which of the following is a correct description of
acetylene?
a.acetylene has only single bonds.
b.acetylene has one double bond.
c.acetylene has one triple bond.
d.none of these is correct.
20) when comparing the boiling points of the halogens with those of the noble gases
which of the following is true?
a.the boiling points decrease as the elements get heavier, and the boiling point of the
halogen is higher than that of the noble gas adjacent to it.
b.the boiling points decrease as the elements get heavier, and the boiling point of the
halogen is lower than that of the noble gas adjacent to it.
c.the boiling points increase as the elements get heavier, and the boiling point of the
halogen is higher than that of the noble gas adjacent to it.
d.the boiling points increase as the elements get heavier, and the boiling point of the
halogen is lower than that of the noble gas adjacent to it.