Question

4. What are non-metals? Explain the chemical properties of non-metals.​

Answer 1

Answer:

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Explanation:

Chemical Properties of Nonmetals...

1. The chemical properties of Metals and Nonmetals are described below. Let us start with the chemical properties of metals.
2. The density of metals is usually high.
3. Metals are malleable and ductile.
4. Metals form an alloy with other metals or non – metals.
5. Some metals react with air and corrode. For e.g. Iron.
6. Metals are good conductors of heat and electricity. Lead is an exception.
7. Generally, metals are in a solid state at room temperature. Except for Mercury. Mercury is in a liquid state.
8. Many metals produce metal oxide by burning in the oxygen of the air. Highly reactive metals react violently when they’re burnt in oxygen.
9. Metals like sodium and potassium are stored in oil as they react with air in seconds. They’re highly reactive metals.
10. Less reactive metals like gold, silver, platinum, etc do not tarnish easily. They stay shiny and lustrous.
11. Metals produce metal oxide and hydrogen gas while reacting with water.
12. Soluble metal oxides dissolve in water and create metal hydroxide.
13. Not all metals react with water. However, highly reactive metals like sodium and potassium react with water violently and an exothermic reaction takes places where the hydrogen immediately catches fire.
14. Salt and hydrogen are produced when a metal reacts with an acid..

Generally, a metal displaces a less reactive metal in a metal salt solution.

Answer 2

Answer:

Non-Metals are the elements that do not conduct heat and electricity, are not shiny and have dull appearance.

Some of the chemical properties of nonmetals are:

• Nonmetals except gas carbon and graphite are poor conductors of heat and electricity.
• Unlike metals, nonmetals are not ductile and malleable.
• Nonmetals react more with metals compared to nonmetals.
•  Nonmetals usually react with other nonmetals at high temperatures
• Most nonmetals do not react with air at room temperature.
• The only nonmetal is the white phosphorus that reacts with air to form its oxide by burning.  
• Nonmetals usually don’t react with water. Except for chlorine, chlorine dissolves in water to produce an acidic solution.  
• Nonmetals have a low density compared to metals.  
• Nonmetals do not form alloys. However, some like carbon, silicon, and phosphorous can form.  
• At room temperature, nonmetals exist in all states of matter.  
• Different nonmetals always have different reactions.  
• In the halogen family, the most reactive metal is chlorine i.e., Bromine (Br), Iodine (I), Chlorine (Cl), and Fluorine (F). The halogen family’s reactivity order is Cl > Br > I.  
• Thus, Chlorine (Cl) can displace Bromine (Br) and Iodine (I) from solutions of Iodides (NaI) and bromides (NaBr).  
• Ionic solids are formed when nonmetals containing high electronegativity react with alkaline earth metals and alkali.

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