AnswersTN-Physical Science SC 26-27 For CreditAtomic Theory

Periodic Table Answers

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1
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This is how zirconium appears in the periodic table.

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A
40
B
51
C
91
D
131
2
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In an element’s square on the periodic table, the number with the greatest numerical value represents the

A
number of neutrons.
B
number of electrons.
C
atomic number.
D
atomic mass.
3

This is how fluorine appears in the periodic table.

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A
the atomic number
B
the atomic mass
C
the mass of neutrons
D
the number of neutrons
4

Based on the information in the table, which elements are most likely in the same periods of the periodic table?

Question illustration
A
Boron and carbon are likely together in one period because they have very close atomic masses, while gallium and germanium are likely together in another period because they have very close atomic masses.
B
Aluminum, boron, and carbon are likely together in one period because they were first isolated in the first half of the 1800s, while gallium and germanium are likely together in another period because they were first isolated in the second half.
C
Boron and carbon are likely together in one period because they each end in “-on,” while aluminum, gallium, and germanium are likely together in another period because they each end in “-ium.”
D
Aluminum, boron, and gallium are likely together in one group because they have the same number of valence electrons, and carbon and germanium are likely together in another group because they have the same number of valence electrons.
5

This is how osmium appears in the periodic table.

Question illustration
A
76
B
114
C
190
D
266
6

Which two chemists organized elements based on properties such as how the elements react or whether they are solid or liquid?

A
Lavoisier and Mendeleev
B
Döbereiner and Newlands
C
Newlands and Mendeleev
D
Lavoisier and Döbereiner
7

What are 1A, 3B, and 7A examples of on the periodic table?

A
groups.
B
numbers
C
periods
D
rows
8

While looking at calcium (Ca) on the periodic table, a student needs to find an element with a greater atomic mass in the same period. Where should the student look?

A
directly up
B
directly down
C
directly to the left
D
directly to the right
9

Elements in group 2 are all called alkaline earth metals. What is most similar about the alkaline earth metals?

A
how many protons and neutrons they have
B
which chemical properties they have
C
how many total electrons they have
D
which period they are most often found in

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