Electrons and the Periodic Table

Question 1

Use the periodic table to determine which elements are likely to have a larger atomic radius than silicon (Si). Check all that apply.

Revolt · Accepted Answer

A: aluminum (Al); D: tin (Sn)

Question 2

Use the periodic table to compare the sizes of ionic radii with the corresponding atomic radii or other ionic radii. Choose from smaller and larger in the blanks below: A sodium cation is than a sodium atom.

Revolt · Accepted Answer

A: smaller

Question 3

What is the predicted order of first ionization energies from highest to lowest for beryllium, calcium, magnesium, and strontium?

Revolt · Accepted Answer

B: Be > Mg > Ca > Sr

Question 4

What is the predicted order of first ionization energies from highest to lowest for aluminum, phosphorus, silicon, and sulfur?

Revolt · Accepted Answer

D: P > S > Si > Al

Question 5

Why are the trends and exceptions to the trends in ionization energy observed? Check all that apply.

Revolt · Accepted Answer

B: Ionization energy tends to increase across a period because the nuclear charge increases.; C: Ionization energy tends to increase across a period because electrons are added to the same main energy level.; E: The ionization energies of elements in Group 13 tend to be lower than the elements in Group 2 because the full s orbital shields the electron in the p orbital from the nucleus.

Question 6

What are the trends and exceptions to the trends in electron affinity? Check all that apply.

Revolt · Accepted Answer

A: The electron affinities of the elements in Group 17 are larger (more negative) than the elements in Group 1.; C: Elements in Group 14 have larger (more negative) electron affinities than elements in Group 15.

Question 7

Use the periodic table to select the element from the drop-down menu that has the correct relative electronegativity.Mg >

Revolt · Accepted Answer

C: Ca

Question 8

Check the correct box to describe the periodic trends in electronegativity.Electronegativity across a period:

Revolt · Accepted Answer

B: increases.

Question 9

Describe the trends in atomic radii by checking the correct box. Atomic radii from the left to right across a period tend to:

Revolt · Accepted Answer

B: decrease.

Question 10

A phosphorus anion is than a phosphorus atom.

Revolt · Accepted Answer

B: larger

Electrons and the Periodic Table Answers

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