Metals Non-Metals And Metalloids In The Periodic Table

The video tutorial explains the classification of 118 elements into metals, metalloids, and non-metals. It introduces a mnemonic to identify metalloids in the periodic table and describes the properties of metals, metalloids, and non-metals. Metals are solid, conductive, malleable, and ductile. Metalloids are semiconductors with metallic luster but are brittle. Non-metals can be solid, liquid, or gas, have lower melting points, are insulators, and are brittle and dull.

How many elements are classified as metals among the 118 elements?

• 20

• 118

• 92

• 6

Which mnemonic helps in identifying metalloids in the periodic table?

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• Metals are shiny

• Non-metals are dull

• Metalloids are brittle

What is a common property of metals regarding their physical state at room temperature?

• They are gases

• They are liquids

• They are solid

• They are plasma

Which of the following is NOT a property of metals?

• Ductile

• Brittle

• Good conductors of electricity

• High melting points

What is a key characteristic of metalloids in terms of conductivity?

• They are insulators

• They are semiconductors

• They are superconductors

• They are non-conductors

Which property is common to both metals and metalloids?

• Low melting points

• Insulators

• Metallic luster

• Brittle

What is a common property of non-metals regarding their physical state?

• They can be solid, liquid, or gas

• They are only liquid

• They are only gas

• They are only solid

Which of the following is a property of non-metals?

• Dull appearance

• Good conductors of electricity

• Malleable

• High melting points

Which element is an example of a non-metal that exists as a gas at room temperature?

• Carbon

• Boron

• Oxygen

• Silicon

What is a common property of non-metals in terms of conductivity?

• They are good conductors

• They are semiconductors

• They are insulators

• They are superconductors