Chemistry Concepts in Food Science

What is the central part of an atom called?

• Electron

• Proton

• Neutron

• Nucleus

Which of the following is a pure substance?

• Air

• Saltwater

• Carbon dioxide

• Salad

What is the chemical symbol for sodium?

• Na

• S

• N

• So

Which type of bond involves the sharing of electron pairs between atoms?

• Ionic bond

• Covalent bond

• Metallic bond

• Hydrogen bond

Tags

NGSS.HS-PS1-1

Which of the following is an organic compound?

• Water

• Sodium chloride

• Glucose

• Calcium carbonate

Which class of organic compounds is characterized by the presence of a hydroxyl group (-OH)?

• Alcohols

• Aldehydes

• Ketones

• Acids

What is the main difference between a chemical change and a physical change?

• Chemical changes are reversible, physical changes are not.

• Chemical changes involve a change in composition, physical changes do not.

• Physical changes involve a change in composition, chemical changes do not.

• Both involve a change in composition.

Tags

NGSS.MS-PS1-2

Which of the following elements is commonly found in proteins?

• Helium

• Nitrogen

• Neon

• Argon

What is the chemical formula for water?

Tags

NGSS.MS-PS1-1

Which of the following is a heterogeneous mixture?

• Vinegar

• Saltwater

• Sand and water

• Sugar solution