Biochemistry Review

What is the smallest part of an element?

• molecule

• atom

• ion

• compound

What are the three parts of an atom?

(a)  

What charge does a proton have?

• negative

• no charge

• positive

What charge does a neutron have?

• positive

• no charge

• negative

What charge does an electron have?

• positive

• no charge

• negative

What is a substance that cannot be broken down into simpler substances?

• ion

• compound

• atom

• element

What is a group of atoms held together by covalent bonds?

• molecule

• atom

• ion

• compound

What determines how acidic or basic a substance is?

• temperature

• pH

• chemicals

• polarity

What is the property of water that involves electrons not being equally shared between the hydrogen and oxygen?

• surface tension

• cohesion

• polarity

• adhesion

What is a weak bond found between oxygen and hydrogen?

• hydrogen bond

• nitrogen bond

• covalent bond

• polar bond