The horizontal rows of elements in the periodic table are called
A) periods.
B) groups.
C) families.
D) series.
Correct Answer:
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Q43: The second most abundant element in the
Q44: The vertical columns of elements in the
Q45: An example of a diatomic molecule of
Q46: Which of the following, along with O2,
Q47: About 85% by mass of Earth's core
Q49: The most abundant element in the universe
Q50: The periodic table is most easily understood
Q51: Diamond and graphite are
A) similar in physical
Q52: Pencil "lead" (graphite) is made primarily of
A)
Q53: When the atoms of two or more
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