Test Review #5- Chemical Bonding

Which Lewis electron-dot diagram represents the bonding in potassium iodide?

• 
• 
• 
• 

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which compound contains both ionic and covalent bonds?

• KClO₃

• MgF₂

• PCl₃

• CH₂O

In which compound do atoms form bonds by sharing electrons?

• NaCl

• MgO

When ionic bonds are formed, nonmetallic atoms tend to

• lose electrons and form positive ions

• lose electrons and form negative ions

• gain electrons and form positive ions

• gain electrons and form negative ions

Tags

NGSS.HS-PS1-1

The degree of polarity in a bond is indicated by

• ionization energy difference

• the shape of the molecule

• electronegativity difference

• the charge on the kernel

The bonds in MgO are best described as

• Covalent, because valence electrons are shared

• Covalent, because valence electrons are transferred

• Ionic, because valence electrons are shared

• Ionic, because valence electrons are transferred

Tags

NGSS.HS-PS1-3

Given the structural formula for oxygen,

What is the total number of electrons shared between the atoms represented in this formula?

• 1

• 2

• 4

• 8

What is the total number of electrons shared in a molecule of N₂?

• 2

• 3

• 4

• 6

Tags

NGSS.HS-PS1-2

Which combination of atoms can form a polar covalent bond?

• H and H

• H and Br

• N and N

• Na and Br

Which formula represents a molecular compound?

• MgO

• LiOH

• N₂O₄

• NaF

Tags

NGSS.MS-PS1-1