Periodic Trends

Question 1

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 2

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 3

Which best describes ionization energy?

Revolt · Accepted Answer

energy needed to remove an electron from an atom or ion in the gas phase

Question 4

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

Revolt · Accepted Answer

Br

Question 5

How does a lithium cation compare to a lithium atom?

Revolt · Accepted Answer

The cation is smaller.

Question 6

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

Revolt · Accepted Answer

Ar

Question 7

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

Revolt · Accepted Answer

Ca2+

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

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 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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