Structure and properties of materials

Elements in the shaded area can best be described as -

• Shiny and brittle, semiconductors

• Insulators

• Good conductors

The elements argon, krypton, and xenon are all non-metals.What property would these elements have in common?

• Good conductor of thermal energy

• Shiny, lustrous surface

• Poor conductor of electricity

• Soft and malleable

Bronze is an alloy of copper and _____.

• Steel

• Tin

• Iron

• Crabon

In steel, iron is mixed with small amounts of non-metal, _______ .

• Copper

• Carbon

• Oxygen

• Zinc

In steel, iron is mixed with small amounts of non-metal, _______ .

• Copper

• Carbon

• Oxygen

• Zinc

Brass is an alloy made of

• Copper and Zinc

• Copper and Tin

• Copper and Nickel

• Iron and Carbon

Alloys are much stronger because...

• the particles from the different metals help the arrangement to stay in fixed positions

• the different metals bond well

• the particles from the different metals mix and disrupt the pattern making it hard for them to slide

A student placed a small chip of limestone into a hydrochloric acid solution, and carbon dioxide gas was released. The carbon dioxide provided evidence that

• Only physical change has occured

• a chemical change occured

A pure substance that cannot be broken down into other substances by chemical or physical means. 

• compound

• mixture

• element

• none

This picture represents which of the following?

• element

• compound

• mixture