Covalent Ionic Metallic Polarity

The Lewis Structure of SiH₃NH₂ shows

• all single bonds
• a double bond
• a triple bond
• 2 double bonds

When Si bonds to H as in SiH₃NH₂, the electronegativity difference is ___ so the bond is __. The electronegativity value of Si is 1.9 and of H is 2.1.

• 0.2, nonpolar
• 0.2, polar
• 0.6, polar
• 1.0, polar

The Lewis Structure of SiH₃NH₂ shows

• 1 lone pair
• 3 lone pairs
• 0 lone pairs
• 2 lone pairs

The shape(s) of SiH₃NH₂ is (are)

• trigonal planar and bent
• tetrahedral and bent
• tetrahedral and trigonal pyramidal
• tetrahedral and trigonal planar

SiH₃NH₂ is

• polar
• nonpolar
• up
• down

Tags

NGSS.HS-PS1-1

(ALL of) the shapes in CH₂CHOH are

• trigonal planar, trigonal planar, bent

• tetrahedral, tetrahedral, bent

• linear, linear, bent

• trigonal pyramidal

CH₂CHOH is

• polar

• nonpolar

• up

• down

Tags

NGSS.HS-PS1-3

When carbon bonds to fluorine as in C₂F₂, the electronegativity difference is ___ so the bond is __. The electronegativity value of carbon is 2.5 and of fluorine is 4.0.  

• 1.5, nonpolar
• 1.5, polar
• 3.0, polar
• 3.0, ionic

The Lewis Structure of C₂F₂, shows

• a triple bond

• a double bond

• two double bonds

• 2 triple bonds

Tags

NGSS.HS-PS1-1

____ substances have high toughness.

• Covalent
• Ionic
• Metallic
• Neither