Exam 1

Question 1

Chemical reactions

Answer 1

• necessary for organisms to store and use chemical energy
• involve forming and using chemical bonds

Question 3

Bonds

Answer 3

Covalent (strongest)
Ionic (Strong)
- Dry stronger than aqueous
Hydrogen bonds (weak)

Question 4

Covalent Bonds

Answer 4

-Atoms share electrons
- Atoms with 4 or 5 electrons in their valence shell tend to share electrons to complete their valence shell
- two atoms share electrons
- the cloud surrounds both atoms

Question 5

Types of covalent bonds

Answer 5

Single (1 pair)
Double (two)
Triple (three)
the more aroms shared the stronger