UB Chemistry Pre-Test / Post-Test

Name

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Which test are you taking?

• The Pre-Test
• The Post-Test

What school will you attend in the Fall?

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What. is the definition of chemistry?

• The study of what atoms are and what they are made of
• The study of matter and the changes it undergoes
• The study of how things explode
• The study of how life changes

What is the density of a cube that has a mass of 40.0 g and a measured volume of 8 cm^3?

• 1 g/cm^3
• 3 g/cm^3
• 5 g/cm^3
• 7 g/cm^3

If your lab procedure instructs you to add two parts acid to each one part water and you start with 25 mL of water, how much acid will you add, and how much acid will you add?

• Add 25 mL of acid to 25 mL of water
• Add 50 mL of acid to 25 mL of water
• Add 50 mL of water to 25 mL of acid
• Add 100 mL of acid to 50 mL of water

Which of the following physical properties is considered intensive?

• Mass
• Volume
• Density
• Area

Which of the following is an incorrect summation of subatomic particles?

• The nucleus is composed of positive protons and neutral neutrons, surrounded by an electron cloud
• The atom is composed of positive energy surrounded by negative electrons.
• The atom is composed of neutral energy.
• Atoms are composed positive neutrons and neutral protons surrounded by electrons in fixed orbits.

If an element has 18 electrons and an atomic mass of 37 amu, how many protons and neutrons does it have?

• 18 protons and 18 neutrons
• 18 protons and 37 neutrons
• 18 protons and 19 neutrons
• 19 protons and 18 neutrons

Which element is considered to be an alkali metal?

• Sodium, Na
• Iron, Fe
• Lead, Pb
• Calcium, Ca