Chemistry

A substance with a pH of 8 is a

• acid

• base

• neutral

Carbon has 4 valence electrons which means

• it can only form bonds with carbon

• it is stable

• it can make ionic bonds

• it wants to make 4 covalent bonds

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NGSS.HS-PS1-1

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The type of bond formed when electrons are shared between atoms is a

• ionic bond

• covalent bond

• hydrogen bond

• peptide bond

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NGSS.MS-PS1-1

The electrons in the outermost energy level are called

• valence

• ions

• covalent

• farthest out

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NGSS.HS-PS1-1

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This reaction is showing energy being _____________

• Absorbed

• Released

• There is no change in energy shown

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NGSS.HS-PS1-4

What is the job of an enzyme?

• Create reactants

• Heat up chemicals

• Provide a substrate

• Speed up reactions in the body

Activation energy is

• The energy to start a car

• The energy needed to break down CO2

• The energy needed to start a reaction

• The energy used to digest food

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NGSS.HS-PS1-4

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The basic unit of matter is the

• cell

• atom

• compound

• element

Acids have more ______ ions than bases

• OH^-

• H^-

• OH⁺

• H⁺

Bone, muscle, and hair are all made of this class of organic compounds

• carbohydrate

• Nucleic Acid

• protein

• lipid

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NGSS.HS-LS1-6