Which of the following is a property of non-metals?
A nonmetal is simply an element that does not display the properties of a metal.
Properties:
1. Nonmetals have high ionization energies and electronegativities.
2. They are generally poor conductors of heat and electricity.
3. Solid nonmetals are generally brittle, with little or no metallic lustre.
4. Most nonmetals have the ability to gain electrons easily.
5. They have a low melting point and boiling point.
Give reasons. (a) Platinum, gold and silver are used to make jewellery. (b) Sodium, potassium and lithium are stored under oil. (c) Aluminium is a highly reactive metal, yet it is used to make utensils for cooking. (d) Carbonate and sulphide ores are usually converted into oxides during the process of extraction.
Which of the following property is generally not shown by metals (except some metals)?
In Fig you find that the bulb glows when an iron nail is placed between two ends of wire. Complete the following sentences on the bases of this fact. __________is a metal. Metals are good_________ of electricity.
Give reasons: NaCl is not a conductor of electricity in solid state whereas is does conduct electricity in aqueous solution as well as in molten state.
____________ is the metal existing in liquid form at ordinary temperatures.
Which of the following metal does not conduct electricity?
Ornaments are usually made up of ____________ gold.
Which is the best conductor of electricity?
The metal which is soft?
An element that is relatively strong is relatively: