Answers IL-Chemistry A-CRThe Structure of the Atom

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Which element has a larger atomic radius than sulfur?

chlorine

cadmium

fluorine

oxygen

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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?

Sb has a lower ionization energy but a higher electronegativity than I.

Sb has a higher ionization energy but a lower electronegativity than I.

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

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

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

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

large nonmetal atoms

small nonmetal atoms

large metal atoms

small metal atoms

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

Ca2+

N3–

Fe3+

S2–

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

an anion that has a larger radius.

an anion that has a smaller radius.

a cation that has a larger radius.

a cation that has a smaller radius.

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?

elements of group 1

elements of group 2

elements of group 15

elements of group 17

How does a lithium cation compare to a lithium atom?

The cation is larger.

The cation has the same radius.

The cation is smaller.

The cation has the same charge.

Which best describes ionization energy?

energy needed to add an electron to a neutral atom in the gas phase

energy needed to add an electron to a neutral atom in the liquid phase

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

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

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

from left to right across a period.

from right to left across a period.

when the atomic radius increases.

down a group.

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