1) which of the following is the correct lewis dot picture of the carbon atom?
a.
b.
c.
d.
2) how many elements are there in period 2?
a.2
b.6
c.8
d.18
3) which of the following occurs when a magnesium atom is converted to mg2+?
a.the magnesium atom gains two electrons and loses two protons.
b.the magnesium atom gains two electrons.
c.the magnesium atom loses two electrons and two protons.
d.the magnesium atom loses two electrons.
4) how many elements are there in period 3?
a.2
b.6
c.8
d.18
5) which of the following is the approximate pressure of oxygen in venous blood?
a.40 mm hgc.160 mm hg
b.100 mm hgd.760 mm hg
6) what is the relationship between the nitrate ion and the nitrite ion?
a.the nitrate ion has one less oxygen atom than does the nitrite ion and both have the
same charge.
b.the nitrate ion has one more oxygen atom than does the nitrite ion and both have the
same charge.
c.in addition to having one less oxygen atom than nitrite, nitrate also has a larger
negative charge.
d.in addition to having one more oxygen atom than nitrite, nitrate also has a larger
negative charge.
7) electrons can sometimes fill orbitals in a manner other than according to the rules we
have specified. if they do so we say the atom is in an excited state. which of the
following represent(s) the excited state of an atom?
a.1s22s22px
2
b.1s22s12px
12py
12pz
1
c.both a and b
d.neither a nor b
8) which of the following best compares democritus view of matter and our current
view?
a.both views are based on belief only
b.both views are based on firm experimental evidence
c.the ancient view was based on thought only, but our view is based on experimental
evidence
d.both views were based on a combination of thought and experimental evidence
9) which of the following is the most characteristic feature of the electronic
configurations of the elements in a vertical column?
a.the electron configurations are identical.
b.the valence electrons are of the same type and number.
c.the valence electrons are always paired.
d.the valence electrons are never paired.
10) which of the following is the correct formula for dinitrogen pentoxide?
a.o2n5
b.o5n2
c.n2o5
d.n5o2
11) which of the following give(s) the correct order of ionization energies?
a.li < na < k < rb
b.na > mg > p > cl
c.both a and b
d.neither a nor b
12) what bond angle is most closely associated with a linear distribution of electron
density?
a.90o
b.109.5o
c.120o
d.180o
13) how many electrons are associated with a double bond?
a.1
b.2
c.4
d.6