1st 6wks midterm questions

Choose the answer choice that describes a physical and chemical property of zinc (Zn)

• brittle at room termperature, but malleable between 100C and 150C/ blue-ish white in color

• burns in air at high temperatures, giving off zinc oxide (ZnO) gas/conducts heat and electricity

• reacts with acids and bases/exposed surfaces tarnish in moist air

• cracking an egg/water freezing into ice

Which of the following is an example of a chemical property?

• malleability

• color

• corrosion

• ductility

Tags

NGSS.HS-PS1-1

Sulfur (S), Oxygen (O), water (H₂O), and sodium chloride (NaCl) are all examples of pure substances. Which of the following describes pure substances?

• A pure substance consists of only one element

• A pure substance has a definite chemical composition

• A pure substance cannot be broken down into simpler substances

• A pure substance is normally found as a solid in room temperature

• Element

• Compound

• Mixture

• element

• compound

• mixture

• element

• compound

• mixture