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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
none
C
5
2) One twelfth the mass of a carbon-12 atom is used to define a(n)
A
atomic mass
B
atomic mass unit
C
atomic number
3) The atomic mass of an element is
A
a ratio based on the mass of a carbon-12 atom
B
a weighted average of the masses of an element's isotopes
C
twice the number of protons in one atom of an element
4) Atoms of the most reactive elements tend to have
A
four or five valence electrons
B
one or seven valence electrons
C
eight valence electrons
5) Compared with Group 2A elements, group 6A elements have
A
more isotopes
B
more atoms in the ground state
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
decreases
B
increases
C
increases and then decreases
8) Which element is found in most of the compounds in your body except for water
A
potassium
B
carbon
C
iodine
9) Two highly reactive elements in period 2 are the metal lithium and the
A
metalloid arsenic
B
nonmetal krypton
C
nonmetal flourine
10) The unit for atomic mass is
A
none of the above
B
amu
C
pound
D
gram
11) Among the alkali metals, the tendency to react with other substances
A
decreases from top to bottom within the group
B
does not vary among the members of the group
C
increases from top to bottom within the group
12) At room temperature, none of the metals are
A
gases
B
soft
C
liquids
13) Which of the following gases emit colors when an electric current is applied?
A
oxygen and nitrogen
B
argon and krypton
C
hydrogen and helium
14) The tendency of an element to react is closely related to
A
its atomic mass
B
the ratio of protons to neutrons in atoms of the element
C
the number of valence electrons in atoms of the element
*select an answer for all questions
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