## 2.5 Metals, metalloids and non-metals (ESAAD)

The elements in the regular table can additionally be split according to even if it is they space metals, metalloids or non-metals. The zigzag heat separates all the elements that are metals from those that are non-metals. Metals are uncovered on the left the the line, and also non-metals are those ~ above the right. Follow me the heat you uncover the metalloids. Friend should an alert that over there are more metals climate non-metals. Metals, metalloids and non-metals all have their own certain properties.

Figure 2.6: A streamlined diagram showing component of the routine table.

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### Metals (ESAAE)

Examples that metals incorporate copper (\$$\\textCu\$$), zinc (\$$\\textZn\$$), yellow (\$$\\textAu\$$), silver (\$$\\textAg\$$), tin (\$$\\textSn\$$) and also lead (\$$\\textPb\$$). The complying with are several of the nature of metals:

Copper wire

Thermal conductors

Metals are great conductors the heat and also are thus used in cooking utensils such together pots and pans.

Electrical conductors

Metals are great conductors the electricity, and are therefore used in electrical conducting wires.

Shiny metallic lustre

Metals have actually a characteristics shiny appearance and also are regularly used to make jewellery.

Malleable and ductile

This way that they can be bent into shape without breaking (malleable) and also can be stretched right into thin wires (ductile) such as copper.

Melting point

Metals usually have a high melting point and can thus be provided to make cooking pots and other equipment that needs to become an extremely hot, without being damaged.

Density

Metals have a high density.

Magnetic properties

Only three key metals (iron, cobalt and nickel) space magnetic, the others room non-magnetic.

You can see exactly how the nature of steels make them very useful in certain applications.

## Looking at metals

Collect a variety of metal items native your house or school. Some instances are noted below:

hair clips

safety pins

cooking pots

jewellery

scissors

cutlery (knives, forks, spoons)

In teams of \$$\\text3\$$–\$$\\text4\$$, incorporate your repertoire of steel objects.

What is the function of every of these objects?

Discuss why you think metal was provided to make each object. You should think about the properties of steels when friend answer this question.

### Non-metals (ESAAF)

In comparison to metals, non-metals are negative thermal conductors, good electrical insulators (meaning that they do not conduct electric charge) and also are neither malleable no one ductile. The non-metals include facets such as sulfur (\$$\\textS\$$), phosphorus (\$$\\textP\$$), nitrogen (\$$\\textN\$$) and also oxygen (\$$\\textO\$$).

Sulfur

### Metalloids (ESAAG)

Metalloids or semi-metals have mostly non-metallic properties. Among their distinguishing characteristics is that their conductivity boosts as your temperature increases.

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This is the contrary of what happens in metals. This building is recognized as semi-conductance and also the materials are dubbed semi-conductors. Semi-conductors are important in digital electronics, such as computers. The metalloids include aspects such as silicon (\$$\\textSi\$$) and germanium (\$$\\textGe\$$).