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Ch 5 Review Games Part 2
Test Description: Ch 5 Phys Sci review games part 2
Instructions: Answer all questions to get your test result.
1) A member of the boron family has three valence electrons, while a member of the nitrogen family has
A
4
B
5
C
none
2) One twelfth the mass of a carbon-12 atom is used to define a(n)
A
atomic number
B
atomic mass
C
atomic mass unit
3) The atomic mass of an element is
A
a weighted average of the masses of an element's isotopes
B
twice the number of protons in one atom of an element
C
a ratio based on the mass of a carbon-12 atom
4) Atoms of the most reactive elements tend to have
A
one or seven valence electrons
B
four or five valence electrons
C
eight valence electrons
5) Compared with Group 2A elements, group 6A elements have
A
more atoms in the ground state
B
more isotopes
C
more valence electrons
6) Moving from left to right across a row of the periodic table, which of the following values increases by exactly one from element to element
A
atomic number
B
atomic mass unit
C
mass number
7) As you move from left to right across a period, the number of valence electrons
A
increases
B
decreases
C
increases and then decreases
8) Which element is found in most of the compounds in your body except for water
A
carbon
B
iodine
C
potassium
9) Two highly reactive elements in period 2 are the metal lithium and the
A
nonmetal krypton
B
metalloid arsenic
C
nonmetal flourine
10) The unit for atomic mass is
A
gram
B
pound
C
none of the above
D
amu
11) Among the alkali metals, the tendency to react with other substances
A
decreases from top to bottom within the group
B
increases from top to bottom within the group
C
does not vary among the members of the group
12) At room temperature, none of the metals are
A
liquids
B
gases
C
soft
13) Which of the following gases emit colors when an electric current is applied?
A
argon and krypton
B
hydrogen and helium
C
oxygen and nitrogen
14) The tendency of an element to react is closely related to
A
its atomic mass
B
the number of valence electrons in atoms of the element
C
the ratio of protons to neutrons in atoms of the element
*select an answer for all questions
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