Brain Activator 8/28/23

Hydrogen Gas (H2)

• Element

• Compound

• Mixture

What separation method is used to separate a mixture of salt and water?

• Filtration

• Distillation

• Chromatography

• Evaporation

Two or more substances mingled together, but not chemically combined, are known as a

• residue

• solution

• distillate

• mixture

What type of mixture is a combination of substances that has a uniform composition and appearance?

• colloid

• heterogeneous

• homogeneous

• suspension

What is Sodium Hydroxide (NaOH)?

• An Element

• A Compound

• A Mixture

Which of the following does this picture represent?

• Element

• Compound

• Mixture of elements

• Mixture of compounds

Which of the following does this picture represent?

• element

• compound

• mixture

Which of the following does this picture represent?

• element

• compound

• mixture

True or false: Air is a mixture.

• True

• False

Pure Substances

• Are made only of one type of atom

• Have the same properties throughout

• Can never be broken down into something simpler

• Are made only of molecules