Chemistry Ch. 6 - Chemical Bonding

The charge on an ion is

• always positive.

• always negative.

• either positive or negative.

• zero.

According to the octet rule, a calcium atom has a tendency to

• lose one electron.

• lose two electrons.

• gain one electron.

• gain two electrons.

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If a compound forms by ionic bonding, which is not true?

• A positively charged atom or group of atoms attracts a negatively charged atom or group of atoms.

• The net charge of the compound is zero.

• The compound contains just two atoms, each of opposite charge.

• Several ions group together in a tightly packed structure.

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The only property listed that is not characteristic of ionic compounds is

• high melting point.

• hardness.

• lack of crystal structure.

• brittleness.

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Which formula listed below represents a polyatomic ion?

• HCO₃ ^-

• H₂SO₄

• Cl^-

• Na⁺

A covalent bond is formed when two atoms

• share an electron with each other.

• share one or more pairs of electrons with each other.

• gain electrons.

• gain electrons.

Which is the correct Lewis structure for SiF₄?

• 
• 
• 
• 

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Which is the correct Lewis structure for C₂H₄?

• 
• 
• 
• 

Which type of bonding is characterized by overlapping orbitals that allow outer electrons of atoms to move about freely in a sea of electrons?

• ionic

• covalent

• metallic

• multiple

An ionic bond results from electrical attraction between

• cations and anions.

• atoms.

• dipoles.

• orbital.

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