Which formula represents a substance that contains covalent bonds?

• LiCl

• CaCl₂

• K₂O

• CO₂

Tags

NGSS.HS-PS1-1

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

• A
• B
• C
• D

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NGSS.HS-PS1-1

How many electrons are shared in a double bond?

• 2
• 4
• 6
• 8

Tags

NGSS.HS-PS1-2

When two nonmetals do not share electrons evenly, the resulting covalent bond will be

• nonpolar
• polar
• ionic
• metallic

Tags

NGSS.HS-PS1-2

The desire for an element to have 8 atoms around it is called 

• Octet Rule
• Resonance
• Ionization energy
• Electronegativity

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Nonmetal elements form bonds by...

• sharing valence electrons to be stable

• sharing protons to be stable

• transferring valence electrons to be stable

• transferring protons to be stable

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following compounds contains only one unshared pair of valence electrons?

• NH₃

• H₂O

• CH₄

• NaCl

• BF₃

How many of the following molecules are polar?

BH₃ CH₄ H₂O HF H₂

• 1

• 2

• 3

• 4

• 5

Of the following, Which has the largest bond angle?

• NH₃

• OF₂

• HCN

• H₂O

• More than one of the above have equally large bond angles.

Which of the following is nonpolar?

• SF₄

• SF₂

• CCl₄

• H₂S

• OC

Tags

NGSS.HS-PS1-1