Properties of elements in the periodic table - The Periodic Table and Elements

Properties of elements in the periodic table

Lessons

Notes:
In this lesson, we will learn:
• The Periodic Table's arrangement of metals and non-metals
• The range of metal and non-metal properties and the importance of variety in the properties of elements.
• How to classify elements as metal, non-metal or metalloids based on their properties.

Notes:

• As seen in lesson 3.2, the current Periodic Table shows elements arranged in terms of metals and non-metals. Metals are on the left whilst non-metals are found on the right of the table.

• This way of classifying elements is important because whether an element is a metal or not suggests a lot of its chemical and physical properties.

• In general, metal properties are as follows:
\circ Metals reflect light - they are shiny, not dull.
\circ Metals conduct both heat and electricity well.
\circ Metals have a high melting and boiling point and are solids at room temperature (except mercury).
\circ Metals are hard, but malleable (when heated, they can be hammered into desired shape) and ductile (they can be drawn out to form wires).

• In general, non-metals have properties opposite to metals:
\circ Non-metals are usually dull and don't reflect light.
\circ Non-metals are poor conductors of both heat and electricity.
\circ Non-metals have a relatively low melting and boiling point – many are gases at room temperature.
\circ If a non-metal is a solid at room temperature, it's normally brittle, meaning its shape cannot easily be changed or manipulated like a metal can.

• The elements in the periodic table show a spectrum of metal character. This means there is not always completely metal or non-metal properties in an element – the most important examples of these are the metalloids, or semiconductors. These elements on the border of metals and non-metals display a mix of metal and non-metal properties.

• The general trend in the periodic table shows increasing metallic character going from right to left in the table, and going down the table toward the bottom. "Increasing metallic character" means the elements will have more metal-like properties.

• Knowing the spectrum and variety of properties that different elements have is important for chemists to help choose the right material for the right use or task.

  • Intro Lesson
    Metals and non-metals in the Periodic Table
  • 1.
    Identify metals, non-metals and metalloids in the Periodic Table.
    Based on its position in the periodic table, suggest whether the element is a metal, non-metal or metalloid.
  • 2.
    Identify metals, non-metals and metalloids by their physical properties.
    Read the material properties below and determine if they are metal, non-metal or metalloid properties.
Teacher pug

Properties of elements in the periodic table

Don't just watch, practice makes perfect.

We have over NaN practice questions in Chemistry for you to master.