Periodic Trends

Question 1

When electrons are added to the outermost shell of a carbon atom, it forms

Revolt · Accepted Answer

an anion that has a larger radius.

Question 2

Which explains the change in ionization energy that occurs between removing the first and second electrons from an atom?

Revolt · Accepted Answer

The ionization energy increases because the ratio of the protons to electrons increases.

Question 3

Which ion was formed by providing the second ionization energy to remove an electron?

Revolt · Accepted Answer

Ca2+

Question 4

Which element has a larger atomic radius than sulfur?

Revolt · Accepted Answer

cadmium

Question 5

Electronegativities of the elements Na, Al, P, and Cl follow a specific trend across the period. Based on this trend, an electron will be most strongly attracted to

Revolt · Accepted Answer

Cl.

Question 6

Which element would most likely have an electron affinity measuring closest to zero?

Revolt · Accepted Answer

Ar

Question 7

Electronegativities of the elements Be, Mg, Ca, and Sr follow a specific trend within their group. Based on this trend, the atoms of which element will have the least attraction for an electron?

Revolt · Accepted Answer

Sr

Question 8

Selected properties of antimony (Sb) and iodine (I) are listed in the table below.ElementAtomic radius(pm)First ionization energy(kJ/mol)Electron affinity(kJ/mol)ElectronegativitySb145?–1032.05I1401008–295?Which predictions can most likely be made?

Revolt · Accepted Answer

Sb has a lower ionization energy and a lower electronegativity than I.

Question 9

The most negative electron affinity is most likely associated with which type of atoms?

Revolt · Accepted Answer

small nonmetal atoms

Question 10

Which correctly summarizes the trend in electron affinity?

Revolt · Accepted Answer

It tends to be more negative across a period.

Periodic Trends Answers

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