Answers TN-Physical Science SC 26-27 For CreditAtomic Theory

Periodic Table Answers

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This is how zirconium appears in the periodic table.

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In an element’s square on the periodic table, the number with the greatest numerical value represents the

number of neutrons.

number of electrons.

atomic number.

atomic mass.

This is how fluorine appears in the periodic table.

the atomic number

the atomic mass

the mass of neutrons

the number of neutrons

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

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.

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.

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.”

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.

This is how osmium appears in the periodic table.

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

Lavoisier and Mendeleev

Döbereiner and Newlands

Newlands and Mendeleev

Lavoisier and Döbereiner

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

groups.

numbers

periods

rows

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?

directly up

directly down

directly to the left

directly to the right

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

how many protons and neutrons they have

which chemical properties they have

how many total electrons they have

which period they are most often found in

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Periodic Table Answers

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