Test Review #5- Chemical Bonding

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

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• 
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Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the correct formula for ammonium carbonate?

• NH₄(CO₃)₂

• NH₄CO₃

• (NH₄)₂(CO₃)₂

• (NH₄)₂CO₃

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

Which element consists of particles that are held together by metallic bonds?

• K

• H₂

• S

• Ne

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

What is the total number of electrons shared in a double covalent bond?

• 1

• 2

• 3

• 4

Refer to the image. What is the total number of electrons shared in an N₂ molecule?

• 2

• 3

• 6

• 8

Tags

NGSS.HS-PS1-2

Which compound contains both ionic and covalent bonds?

• KF

• CaCl₂

• CH₂Br₂

• NaCN