Chemistry 1 Review - Unit 3 Bonding

The correct Lewis dot structure shows how the shape of a water molecule is ____.

• linear and polar

• linear and nonpolar

• bent and polar

• bent and nonpolar

Which characteristic is common to MOST metals?

• They tend to form covalent compounds with other elements.

• They have one, two, or three valence electrons.

• They have low melting and boiling points.

• They tend to form negative ions.

Which model represents the bonding in NaCl, sodium chloride?

• 
• 
• 
• 

Tags

NGSS.HS-PS1-3

Ne, Ar, and Kr are all in the same column (group) on the periodic table. What do all three of these elements have in common?

• atomic mass

• negative electrical charge

• number of neutrons

• full valence electron shells

Tags

NGSS.HS-PS1-1

What is the molecular geometry of carbon tetrachloride (CCl₄)?

• linear

• trigonal planar

• tetrahedral

• trigonal pyramidal

The diagrams in the box represent the Lewis dot structures for different molecules. Which molecule would be polar based on its Lewis dot structure?

• A

• B

• C

• D

The chart shows the electronegativity values as the elements are arranged on the periodic table. Which statement best describes the electronegativity values of the elements shown?

• Electronegativity decreases with increasing atomic number within a period.

• Electronegativity decreases with increasing atomic number within a group.

• Electronegativity tends to be higher in the metals than in the nonmetals.

• Electronegativity tends to be lower in the gases than in the solids.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Compounds can be classified as covalent or ionic by noting the location on the periodic table for each atom in the compound. Which compound is covalently bonded?

• sodium chloride (NaCl)

• sulfur dioxide (SO₂)

• potassium bromide (KBr)

• magnesium chloride (MgCl₂)

What is the IUPAC name for the compound N₂O₃?

• nitric oxide

• nitrous oxide

• dinitrogen trioxide

• trioxygen dinitride

According to VSEPR theory, molecules of which of these compounds have a trigonal planar geometry?

• acetylene, C₂H₂

• carbon dioxide, CO₂

• carbon tetrachloride, CCl₄

• formaldehyde, CH₂O