Nonmetallic Properties and Electrical Conductivity of Carbon, Iodine, Sulfur, and Phosphorus

The video explores the properties of nonmetals such as carbon, iodine, sulfur, and phosphorus. It tests their electrical and thermal conductivity, as well as their sonority. Nonmetals are generally poor conductors of electricity and heat, and they do not produce a metallic sound. However, there are exceptions like iodine, which is lustrous, and graphite, a form of carbon that conducts electricity. The video concludes by contrasting these properties with those of metals, which are good conductors and sonorous.

Which of the following is a common property of nonmetals?

• They are brittle.

• They are malleable.

• They are lustrous.

• They are ductile.

What happens when sulfur is placed in an electrical circuit?

• The bulb glows brightly.

• The bulb glows dimly.

• The bulb does not glow.

• The bulb flickers.

Which nonmetal is known to be an insulator of electricity?

• Silver

• Copper

• Phosphorus

• Aluminum

How does iodine behave in terms of electrical conductivity?

• It is a good conductor of electricity.

• It allows partial flow of electricity.

• It is a poor conductor of electricity.

• It conducts electricity well.

What is the result of heating one end of sulfur?

• The other end changes color.

• The other end becomes hot.

• The other end remains cold.

• The other end melts.

Which nonmetal is a poor conductor of heat?

• Sulfur

• Copper

• Iron

• Gold

What sound does carbon make when tapped?

• No sound

• A clinking sound

• A dull thud

• A ringing sound

Which property is not exhibited by nonmetals?

• Non-lustrous

• Insulation

• Brittleness

• Sonority

Which form of carbon is known for its hardness?

• Charcoal

• Graphite

• Soot

• Diamond

Which form of carbon is an exception as a good conductor of electricity?

• Diamond

• Graphite

• Charcoal

• Soot