Bio Lesson 2.1 Chemical Bonds & Reactions

Atoms connected by covalent bonds share

• hydrogen ions

• ionic compounds

• pairs of electrons

• carbon and oxygen

From the information that two atoms have two different proton counts,

you can conclude that these atoms . . .

• belong to two entirely different elements

• represent different isotopes

• are likely to react violently with each other

• might be two ions of the same element

Select all that apply:  What particle(s) are found in the center (core) of the atom? 

• Neutron

• Electron

• Proton

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What is a molecule?

• A molecule is a form of light.
• A molecule is a group of two or more atoms held together by covalent bonds.

• A molecule is a type of cell.
• 2+ different elements bonded together

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What is a compound?

• A compound is a substance formed by the mechanical combination of two or more elements.
• A compound is a substance formed by the chemical combination of two or more different elements

• The same elements bonded together

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Enzymes are an example of

• Lipids

• Carbohydrate

• Protein

• Nucleic Acid

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What is the purpose  of an enzyme?

• give permission for the reaction
• raise activation energy
• speed up reactions
• control how many reactions occur

Letter D...

• active site
• enzyme
• substrate
• products

In a chemical reaction, ________ are what you have at the end

• Products

• Molecules

• Reactants

• Substances

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In a chemical reaction, bonds are broken and new bonds are formed that create new substances. The bonds that are broken are called what?

• Reactants
• Products
• Atoms
• Catalysts

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