Introduction to Chemistry

What is classified as "matter"?

• 
• 
• 
• All are matter.

Which state of matter has no definite shape or volume?

• Gas

• Liquid

• Solid

"Carbon" is classified as................

• Homogeneous mixture

• Heterogeneous mixture

• Compound

• Element

"Table salt" is classified as................

• Heterogeneous mixture

• Compound

• Homogeneous mixture

• Element

Which one describes the physical property of sodium?

• Sodium's surface turns black when first exposed to air.

• Sodium is a solid at 25^oC and changes to a liquid when heated to 98^oC.

• When placed in water, sodium sizzles and a gas is formed.

• When placed in contact with chlorine, sodium forms a compound that melts at 801^oC.

What is the smallest form of a chemical element?

• nucleus

• molecule

• atom

• electron

What is subatomic particle with a positive charge?

• nucleus

• neutron

• electron

• proton

What is subatomic particle with a negative charge?

• proton

• neutron

• electron

• nucleus

What is the molecule that has gained or lost electrons?

• atom

• molecule

• nucleus

• ion

What is the amount of matter in an object?

• Volume

• Density

• Mass

• Length