Periodic Trends

Question 1

The graph below shows the electronegativities of the elements in the periodic table.Which would least strongly attract electrons from other atoms in a compound?

Revolt · Accepted Answer

elements of group 1

Question 2

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

Revolt · Accepted Answer

Ar

Question 3

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 4

Among the elements of the main group, the first ionization energy increases

Revolt · Accepted Answer

from left to right across a period.

Question 5

Which correctly summarizes the trend in electron affinity?

Revolt · Accepted Answer

It tends to be more negative across a period.

Question 6

Which element has a larger atomic radius than sulfur?

Revolt · Accepted Answer

cadmium

Question 7

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

Revolt · Accepted Answer

Ca2+

Question 8

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

Revolt · Accepted Answer

Ca2+

Question 9

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 10

Which element would release the most energy while adding an electron to a neutral atom in the gas phase?

Revolt · Accepted Answer

Br

Periodic Trends Answers

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