Ch. 2 Test Review

The four main types of carbon-based molecules in organisms are carbohydrates, lipids, proteins and

• fatty acids

• starches

• nucleic acids

• monosaccharides

How many protons does Barium have?

• 11

• 56

• 22

• 50

Substances are changed into different substances when bonds break and form during

• chemical equilibrium

• ion formation

• hydrogen bonding

• chemical reactions

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5

Chemical reactions that absorb more energy than they release are called

• activated

• endothermic

• catalyzed

• exothermic

Tags

NGSS.HS-PS1-4

The activation energy needed for a chemical reaction is decreased by a

• substrate

• product

• reactant

• catalyst

Tags

NGSS.HS-PS1-5

How many neutrons does Argon have?

• 50

• 56

• 22

• 29

How many electrons does Copper have?

• 106

• 29

• 56

• 11

Tags

NGSS.HS-PS1-1

When atoms share pairs of electrons they form

• ionic bonds

• covalent bonds

• polymers

• hydrogen bonds

Tags

NGSS.HS-PS1-1

What forms when an atom gains or loses electrons?

• ion

• molecule

• compound

• element

Which is the most acidic?

• pH 3

• pH 8

• pH 14

• pH 2