Phy Sci 6ed Chap 5 Review

Which of the following accurately represents the Lewis structure for Phosphorus tribromide using dots rather than dashes to represent the valence electrons.

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Draw the Lewis structure for Sulfur dichloride (SCl₂)

Answer explanation

How many electrons are being shared in a molecule of water?

• 2

• 4

• 6

• 8

When drawing atoms in their Lewis structure, what is something you must check to be true?

• each atom has 8 valence electrons

• the atoms are arranged in a geometrically pleasing format

• the atoms are in alphabetical order

• the largest atom is in the center

In carbon dioxide, carbon has an electronegativity of 2.55 and oxygen has an electronegativity of 3.44. Is the bond between an oxygen and carbon atom polar?

• Impossible to know without experimentation

• No
• Yes

In carbon dioxide, carbon has an electronegativity of 2.55 and oxygen has an electronegativity of 3.44. Is the entire molecule of carbon dioxide polar? How do you know?

• No, because they are geometrically balanced

• Yes, because the bonds are polar

• No, because the bonds are nonpolar bonds

• Yes, because the number of atoms around the carbon is 8

The electronegativity of oxygen is 3.44. Is dioxygen, the diatomic oxygen molecule, a polar molecule?

• No
• Maybe
• I don't know
• Yes

If Magnesium bonds with Iodine to form magnesium iodide, what would you predict to be the ratio of magnesium to iodine atoms in the ionic bond?

• 1:2; MgI₂

• 1:3; MgI₃

• 2:1; Mg₂I

• 1:1; MgI

predict the name and formula for a compound containing Iron and fluorine if Iron's oxidation state is +2

• Iron(II) fluoride (FeF)
• Iron(II) fluorite (FeF₂)

• Iron(II) fluorine (FeF₂)

• Iron(II) fluoride (FeF₂)

What would the name of the covalent compound containing 5 atoms of bromine and one atom of phosphorus be?

• phosphorus bromide
• bromine pentaphosphide
• bromine phosphide
• phosphorus pentabromide