Bonding and Lone Pairs

What is the correct name for the for the compound with the formula, Fe(NO₃)₂?

• iron nitrate

• iron(I) nitrate

• iron(II) nitrate

• iron nitrate(III)

According to VSEPR theory, repulsion between electron pairs in a valence shell increases in the order

• lone pair-lone pair > lone pair-bond pair > bond pair-bond pair.

• bond pair-bond pair > lone pair-bond pair > lone pair-lone pair.

• lone pair-lone pair > bond pair-bond pair > bond pair-lone pair.

• bond pair-bond pair > lone pair-lone pair > lone pair-bond pair.

Which statement is correct about two elements whose atoms form an ionic bond with each other?

• The elements are metals.

• The elements are non-metals.

• The elements have very low electronegativity values.

• The elements have very different electronegativity values.

Which molecule is most similar in shape to CO₃^2-?

• GaI₃

• BF₃

• FeCl₃

• PBr₃

Which molecule has the largest bond angle?

• CO₂

• NH₃

• CH₄

• C₂H₄

When the species BF₂⁺, BF₃ and BF₄^– are arranged in order of increasing F−B−F bond angle, what is the correct order?

• BF₃, BF₄^–, BF₂⁺

• BF₄^–, BF₃, BF₂⁺

• BF₂⁺, BF₄^–, BF₃

• BF₂⁺, BF₃, BF₄^–

 A lone pair is defined as

• A pair of bonding electrons
• One non-bonding electron
• A pair of non-bonding electrons
• A pair of electrons on the central atom

How many electrons are shared in a triple bond?

• 6
• 3
• 6 pairs
• 5

What molecular shape is the structure shown here? (H₂O)

• tetrahedral
• trigonal planar
• bent
• trigonal pyramidal

What molecule could this be? 

• BF₃
• CH₄
• H₂O
• CO₂

Tags

NGSS.HS-PS1-3