‹ Class 8 · Ch 8
Elements, Compounds, and Mixtures · Principle 14 of 22

Kinds of elements

Metals, non-metals and in-betweens.

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NCERT: 8.3.1 Elements — [A step further]

Think

Gold and sulfur

Gold shines and is a metal. Sulfur is a yellow non-metal. Some elements are in between.

What are the elements in between called?

What this lesson covers

The idea

Elements are classified into metals and non-metals; some elements, such as silicon and boron, have properties intermediate between metals and non-metals and are called metalloids.

Gold and sulfur

Gold shines and is a metal. Sulfur is a yellow non-metal. Some elements are in between.

What are the elements in between called?

  • Metalloids
  • Alloys
  • Compounds

Sort the elements

Tap the bin where each element belongs.

Three groups

Elements can be classified into metals and non-metals. A few elements have properties in between.

Elements are metals or non-metals. Elements like silicon and boron have properties between the two. They are metalloids.

  • Group | Examples
  • Metals | Gold, silver, magnesium, iron, aluminium
  • Non-metals | Carbon, sulfur, hydrogen, oxygen
  • Metalloids | Silicon, boron

Notes

Elements: metals, non-metals, and metalloids (in between).

Check yourself

Silicon and boron are …

Which of these is a non-metal?

Which of these is a metal?

Metalloids have properties …

  • metals only. They have properties between those of metals and non-metals.
  • non-metals only. They have properties between those of metals and non-metals.
  • metalloids — correct. Yes!
  • Sulfur — correct. Yes!
  • Gold. Gold is a metal.
  • Iron. Iron is a metal.
  • Carbon. Carbon is a non-metal.
  • Aluminium — correct. Yes!
  • Oxygen. Oxygen is a non-metal.
  • exactly like metals. They are in between.
  • exactly like non-metals. They are in between.
  • intermediate between metals and non-metals — correct. Yes!
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