Types, Properties, Structure of Matter

Use your Periodic Table of Elements to answer the following question: If protons are shown in yellow, what type of atom is shown here?

• Neon

• Boron

• Carbon

• Protons

Is the following a molecule or a compound?

Caffeine: C₈H₁₀N₄O₂

• Molecule

• Compound

The atomic number of an element indicates how many _________ can be found in the nucleus.

• compounds

• protons

• neutrons

• electrons

A child is upset because his ice cream is melting. He thinks he now has less dessert. Which of the following explanations correctly states why the child is incorrect?

• He actually has more, not less, ice cream

• No mass is lost during a change of state

• The mass will increase if he freezes the melted ice cream.

• Mass is lost only during certain changes of state, such as freezing.

Which process is an example of a physical change?

• burning

• rusting

• flattening

• decomposing

Which process represents a chemical change?

• A lake freezes over into ice.

• A metal bar is rolled into a flat sheet.

• Vinegar bubbles when baking soda is added.

• Sand, water, and salt combine to form a mixture.

Which of these mixtures is a suspension?

• A

• B

• C

• D

What happens at the melting point of a substance?

• The substance begins to turn from a solid into a gas.

• The substance begins to turn from a liquid into a gas.

• The substance begins to turn from a gas into a liquid.

• The substance begins to turn from a solid into a liquid.

Which term describes when a substance is changed from a liquid to a gas?

• Condensation

• Evaporation

• Filtration

• Precipitation

What does it mean if a mixture is heterogeneous?

• you can see the different parts
• cannot tell one part from another
• very well blended
• made of elements