Chemical Bond Energy

What is an electron?

• + charged particle in an atom's nucleus

• - charged particle in an atom's nucleus

• - charged particle outside an atom's nucleus

• + charged particle outside an atom's nucleus

What is a valence electron?

• electron available for bonding

• electron in the outermost level of an atom

• electron in the innermost level of an atom

• total number of an atom's electrons

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NGSS.HS-PS1-1

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How can you determine an atom's valence electrons?

• the column on the periodic table

• the row on the periodic table

• the atomic number

• the atomic mass

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NGSS.HS-PS1-1

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How many valence electrons do most electrons want in their valence shell to be stable? (Except hydrogen!)

• 2

• 4

• 6

• 8

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NGSS.HS-PS1-1

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How do atoms fill their valence level with electrons?

• share with other atoms

• steal from other atoms

• give up electrons to other atoms

How many electrons are shared in one chemical bond?

• 2

• 4

• 6

• 8

What kind of energy is stored in the chemical bonds between atoms?

• kinetic energy

• thermal energy

• chemical energy

• light energy

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NGSS.HS-PS1-4

What kind of energy is released or absorbed when chemical bonds are formed and broken?

• kinetic energy

• thermal (heat) energy

• chemical energy

• light energy

All types of chemical bonds hold the same amount of chemical energy.

• True

• False

Which units are used to measure energy?

• Newtons

• kilograms

• meters/second

• Joules