UB Chemistry Post Test Review

1. You are heating a substance in a test tube. Always point the open end of the tube

• away from yourself
• away from your lab partner
• away from another classmate
• all of the above

2. Laboratory work can be started immediately upon entering the laboratory even if the instructor is not yet present.

• True
• False

3. What is the name of the lab equipment pictured below?

• beaker
• test tube
• erlenmyer flask
• graduated cylinder

Which tool below is the best for measuring the mass of a powder?

• Test tube
• Bunsen burner
• Graduated cylinder
• Balance

Which tool below is the best for measuring the volume of liquid?

• Test tube
• Bunsen burner
• Graduated cylinder
• Balance

Which tool below is the best for heating a sample that is in a crucible?

• Test tube
• Bunsen burner
• Graduated cylinder
• Balance

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Which tool below is the best for holding a small volume of liquid or solid?

• Test tube
• Bunsen burner
• Graduated cylinder
• Balance

5. What is the atomic number of an element whose atoms have 9 protons and 10 neutrons?

• 9
• 19
• 10
• 1

6. How many electrons are in a neutral lithium atom?

• 3
• 7
• 6.941
• 4

7. Which of the following is 𝙩𝙧𝙪𝙚 about an atom’s subatomic particles?

• A proton’s mass is equal to an electron’s mass
• The only subatomic particle that does not carry a charge is a neutron
• An atom's nucleus contains protons and electrons
• None of the above