Metals and Non-metals

Gap-fill exercise

  
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Metals, in their pure state, have a shining surface. This property is called .

Some metals can be beaten into thin sheets. This property is called .

It is because of their malleability and that metals can be given different shapes according to our needs.

The best conductors of heat are silver and .

Lead and are comparatively poor conductors of heat.

All metals except exist as solids at room temperature.

Iodine is a non-metal but it is .

Metal oxides which react with both acids as well as bases to produce salts and water are known as oxides.

The elements or compounds, which occur naturally in the earth’s crust, are known as .

Ores mined from the earth are usually contaminated with large amounts of impurities such as soil, sand, etc., called .

The carbonate ores are changed into oxides by heating strongly in limited air. This process is known as .

The sulphide ores are converted into oxides by heating strongly in the presence of excess air. This process is known as .

Metals can form positive ions by losing electrons to .

A list of common metals arranged in order of their decreasing reactivity is known as an .

The extraction of metals from their ores and then refining them for use is known as .

An is a homogeneous mixture of two or more metals.

The surface of some metals, such as iron, is corroded when they are exposed to moist air for a long period of time. This phenomenon is known as .

Non-metals form which are either acidic or neutral.

is a method of protecting steel and iron from rusting by coating them with a thin layer of zinc.