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How many valence electrons are elements trying to reach in their outer shells?

• 1
• 2
• 5
• 8

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

What determines the reactivity of an element?

• Size of its nucleus
• Number of total electrons
• Number of valence electrons
• Number of shells

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

How do you determine the number of valence electrons an element has?

• Look at its period
• Look at its group
• Look at its atomic number
• Look at its atomic mass

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NGSS.HS-PS1-1

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When two atoms share electrons, a chemical bond is formed.  This type of bond is called:

• covalent bond
• ionic bond
• crystal bond
• polyatomic bond

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NGSS.HS-PS1-1

What two types of atoms make a covalent bond?

• 2 Nonmetals
• 1 Nonmetal and 1 Metal
• 2 Metals
• 2 Noble Gases

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NGSS.HS-PS1-1

What type of elements will form an ionic bond?

• Metals + Metals
• Nonmetals + Nonmetals
• Metals + Nonmetals
• None of the above

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which is an example a covalent compound?

• CO₂
• NaCl
• AlF₃
• MgO

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NGSS.MS-PS1-1

Ionic Bonding involves...

• The transfer of protons
• The transfer of nuetrons 
• The transfer of electrons
• None Of the above

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NGSS.HS-PS1-2

Covalent compounds

• Share electrons
• transfer electrons
• contain a sea of electrons
• conduct electricity

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NGSS.HS-PS1-2

Predict the bond that will form between Se and Cl.

• Ionic
• Covalent

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NGSS.HS-PS1-1

NGSS.HS-PS1-2