Chemistry Unit 5

A physical property that describes how tightly packed molecules are in a substance

• Density
• Conductivity
• Solubility
• Magnetistm

Density is measured in ___________

• g
• g/mL
• mL
• N

Which is dependent on the amount of a sample?

• mass
• density
• melting point
• electrical conductivity

Which is an example of a physical property?

• ability to react with acid
•  color
• flammability
• ability to react with oxygen

Physical properties are

• properties that can be observed without changing the identity of the substance
• properties that describe how a substance changes into a completely different substance
• properties that we can only observe with our eyes
• properties that we need special tools to observe

What kind of properties can only be observed when a substance changes into a different substance?

• physical properties
• chemical properties
• liquid properties
• real properties

What is burning an example of?

• physical change
• physical property
• chemical change
• chemical property

Look at this picture of Argon off the periodic table. Which of the following is true for this element?

• 18 protons

• 40 protons

• 22 protons

• 21.9 protons

Look at this picture of Argon off the periodic table. Which of the following is true for this element?

• 18 neutrons

• 40 neutrons

• 22 neutrons

• 21.9 neutrons

Look at this picture of Argon off the periodic table. Which of the following is true for this element when it is neutral?

• 18 electrons

• 40 electrons

• 22 electrons

• 21.9 electrons