Covalent bonding and Molecule practice

According to VSPER, what is the molecular shape for the Lewis structure shown? Why?

• tetrahedral, because it has three bonding pairs of electrons on the central atom

• trigonal pyramidal, because it has three bonding pairs of electrons and one lone pair of electrons on the central atom

• bent, because it has a lone pair of electrons on the center atom

• trigonal planar, because it has three bonding pairs of electrons on the central atom

What is the electronegativity difference between the N-Cl bond? Is the bond polar or non polar?

• 0, polar

• 0 non polar

• 3.0 ionic

• 3.0 non polar

What is the molecule polarity?

• non polar

• polar

What is the molecule polarity for the molecule shown?

• polar

• non polar

Which two elements are most likely to form a covalent bond?

• C and Ca

• P and F

• Sr an S

• Li and Cl

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What causes a polar molecule to form?

• Electrons spending more time around one side of a molecule causing + and - charges to form.

• Protons spending more time around one side of a molecule causing + and - charges to form.

• Electrons spend equal time around both sides of a molecule causing no charges to form

• Protons spend equal time around both sides of a molecule causing no charges to form

Draw the best Lewis structure for the covalent compound NF₃ including all bonds and lone pair electrons.

• A

• B

• C

• D

• E

What is the correct formula for this molecule?

• NH
• N₃H
• NH₃
• NH₄

Tags

NGSS.MS-PS1-1

Which of the following is the correct Lewis dot structure for the molecule fluorine (F₂)?

• A
• B
• C
• D

Tags

NGSS.MS-PS1-1

Which of the following is the correct Lewis structure for the compound PBr₃?

• structure A
• structure B
• structure C
• structure D

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2