Physical and chemical properties of metal and non metal 0th
Answers
Metal
Chemical properties
1.The density of metals is usually high.
2.Metals are malleable and ductile.
3.Metals form an alloy with other metals or non – metals.
4.Some metals react with air and corrode. For e.g. Iron.
5.Metals are good conductors of heat and electricity. Lead is an exception.
6.Generally, metals are in a solid state at room temperature. Except for Mercury. Mercury is in a liquid state.
7.Many metals produce metal oxide by burning in the oxygen of the air. Highly reactive metals react violently when they’re burnt in oxygen.
Metals like sodium and potassium are stored in oil as they react with air in seconds. They’re highly reactive metals.
Physical Properties
1. They are generally hard, strong solids, for example, aluminium, iron, zinc, tin and copper. They are strong enough to bear heavy loads, i.e., they have a high tensile strength.
2. They have a lustre, known as metallic lustre. For example, aluminium, iron, zinc, copper, silver and gold are all lustrous. Such metals can be polished too.
3. Metals are sonorous. When struck, they produce a sound called a metallic sound or metallic clink. Recall the ringing of a bell or the clink of coins.
4. Metals are malleable. In other words, they can be beaten or rolled into sheets. Aluminium, iron, copper or silver can be beaten or rolled into thin sheets. Common examples are the silver foil used to decorate sweets and aluminium foil used to pack foodstuff.
5. Metals are ductile, i.e., they are flexible and can be drawn into wires. For example, iron, aluminium, copper, silver and gold can be easily drawn into wires.
6. Metals are good conductors of heat, i.e., they allow heat to pass through them easily. Due to this property, we use metal utensils in kitchens. Heat supplied at one place of the utensil is conducted all over it.
Non Metal
Chemical properties
1.Nonmetals are poor conductors of heat and electricity. Graphite and Gas carbon are exceptions.
2.Unlike metals, nonmetals aren’t malleable and ductile.
3.Nonmetals react more with metals than with nonmetals.
Usually, nonmetals react with other nonmetals in high temperature.
Most nonmetals do not react with air in room temperature.
White phosphorus is the only nonmetal that reacts with air to form its oxide by burning.
4.Usually, nonmetals do not react with water. Except for Chlorine, chlorine dissolves in water to form an acidic solution.
5.Nonmetals have a low density.
6.They do not form alloys. However, nonmetals like carbon, silicon and phosphorous.
Physical Properties
i. Usually lustreless (dull), except graphite and iodine,
ii. Brittle (if solid),
iii. Bad conductors of heat,
iv. Bad conductors of electricity (except graphite), and
v. Non-sonorous (i.e., they do not produce a metallic clink).
Of the 24 nonmetals known today,
vi. 12 are solids (e.g., carbon, silicon, phosphorus, sulphur, iodine),