Answers NY-Chemistry Term 1 HillcrestCovalent Bonding

Covalent Bonding Answers

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Which structure shows the correct electron arrangement in CCl4?

A central upper C is single bonded to upper H above, below, and to the left, and single-bonded to upper C l to the right. The C l has three pairs of electron dots, above, right, and below.

A central upper C is single bonded to upper C l to the top, bottom, and left; those upper C l atoms have three pairs of electron dots on the sides away from the bond. The C is also single bonded to an upper H to the right.

A central upper C is single bonded to upper H above and below, and to upper C l to the left and right. The C l have three pairs of dots, above, below, and to the side opposite the bond.

A central upper C is single bonded to upper C l above, right, left, and below. All the C l atoms have 3 pair of electron dots, on the three sides that do not have the bond.

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Some atoms are exceptions to the octet rule by having an expanded octet. Which characteristic is needed for an atom to have an expanded octet?

The atom has empty d-orbitals.

The atom has more than eight valence electrons before bonding.

The atom has empty p-orbitals.

The atom has fewer than eight valence electrons after bonding.

Which type of bond will form between two chlorine atoms?

an ionic bond

a metallic bond

a polar covalent bond

a nonpolar covalent bond

How many valence electrons are available for bonding in silicon?

four

five

eight

fourteen

Which statement describes a property of covalent compounds?

They have a high boiling point because of strong intermolecular forces.

They have a low boiling point because of weak intermolecular forces.

They have a low melting point because of strong intermolecular forces.

They have a high melting point because of weak intermolecular forces.

Which compound contains only a nonpolar covalent molecule?

HCl

H2O

NO3

A solid compound in a sealed container was kept at a very low temperature in a freezer. When placed at room temperature, the substance quickly turned into a liquid. This compound is most likely which of the following?

an ionic compound because it has a low boiling point

a covalent compound because it has a low boiling point

an ionic compound because it has a low melting point

a covalent compound because it has a low melting point

Which statement about covalent compounds is true?

They are able to melt at high temperatures.

They are poor conductors of heat.

They have strong intermolecular attractions.

They have atomic bonds that are easy to break.

Which element has the fewest valence electrons available for bonding?

iodine

aluminum

carbon

nitrogen

Which element has the greatest number of valence electrons available for bonding?

selenium

boron

calcium

chlorine

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Covalent Bonding Answers

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