Chemical Bonding

Which of the following has a full valence shell?

• Oxygen
• Neon
• Barium
• Carbon

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

An ionic bond forms when atoms ___________ electrons.

• gain
• share
• increase
• transfer

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NGSS.HS-PS1-2

Which type of bond has an equal sharing of electrons?

• Polar Covalent 
• Non Polar Covalent
• Ionic
• Metallic

Which type of bond has an unequal sharing of electrons?

• Polar Covalent 
• Non Polar Covalent
• Ionic
• Metallic

Chemical bonds form when atoms

• combined nuclei
• give up neutrons
• gain protons
• share or transfer electrons

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NGSS.HS-PS1-2

Bonds that form between two metals are called ______________ bonds.

• ionic 
• covalent
• metallic
• pervasive

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NGSS.HS-PS1-4

If an atom gains one electron what charge will it have?

• -2
• -1
• +1

What is the number of valence electrons for Oxygen?

• 8
• 6
• 2
• 1

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NGSS.HS-PS1-1

In chemical compounds, covalent bonds form when

• the electronegativity difference between two atoms is very large.
• electrons are completely transferred between two metals.
• pairs of electrons are shared between two nonmetal atoms.
• two nonmetal atoms are attracted to each other by opposite charges.

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NGSS.HS-PS1-1

What happens when an atom loses an electron?

• It becomes Negatively Charged
• It remains neutral because the proton also leaves.
• It becomes Positively Charged
• It stays the same.