Metals Nonmetals Metalloids

What is a property that metals tend to have in common?

• easily breakable

• dull and dark in color

• conduct electricity well

A semiconductor would be a -

• metal

• nonmetal

• metalloid

What would be the best way to determine an element’s luster?

• Submerge it in water.

• Shine light on it.

• See if it conducts electricity.

Manganese is a shiny element that conducts heat and electricity well and can be hammered into thin sheets. Silicon is a dull, metallic element that is brittle and shatters when shaped. Which is a metal?

• Manganese

• Silicon

• Both

Which of these elements is most likely a good conductor of heat and electricity?

• hydrogen, a nonmetal gas

• carbon, a nonmetal solid

• cobalt, a metal solid

Tags

NGSS.MS-PS3-3

A group of elements have no luster, have no conductivity, and are brittle. What is the classification of these elements?

• metals

• nonmetals

• metalloids

What properites do nonmetals have in common?

• Poor conductor of electricity

• Good conductor of thermal energy

• Soft and Malleable

• Shiny, lustrous surface

Gold is an element that is often used to make necklaces, rings, and other types of jewelry. What property of gold makes it useful in this way?

• Gold is a conductor

• Gold is an insulator

• Gold is malleable

• Gold has a high melting point

A student investigates conductivity. The student uses a wire connected to a battery, test object, and bulb. The student knows objects with greater conductivity will cause the bulb to light more brightly. Which item will have the greatest conductivity?

• Silicon

• Phosphorus

• Iron

• Sulfur

Which property CANNOT be used to distinguish physical characteristics of metals and nonmetals?

• Conductivity

• Malleability

• Reactivity

• Luster