Question

2 Metals and their uses
2. Methods to prevent rusting
3. Non-metals and their uses
4.Metalloids and their uses​

Answer 1

$\mathbb\purple{ANSWER 01}$

$\mathbb\pink{METALS}$

Majority elements in the periodic table are metals. This comprises of alkali metals, transition metals, lanthanides, actinides and alkaline earth metals. Metals are divided by nonmetals on a periodic table through a zigzag line starting from carbon, till radon. The elements between the two are phosphorus, selenium and iodine.

• At room temperature, they are usually solids (except mercury).
• They usually have high boiling and melting points.
• They are shiny having metallic lustre.
• They are good conductors of heat and electricity.
• They are malleable, that is, they can be hammered into thin sheets.
• They are ductile, that is, they can be drawn into wires.
• All the metals tend to lose electrons easily.

$\mathbb\green{USES}$

• In the Construction Industry
• In electronics
• In medicine
• Machinery, Refractory and Automobiles
• Decorative products
• Other Uses

$\mathbb\purple{ANSWER 02}$

1. In attachment

$\mathbb\purple{ANSWER 03}$

$\mathbb\pink{NON-METALS}$

These are present on the right-hand side in the periodic table. Elements that come under non-metals are sulphur, carbon, all halogens, phosphorus, hydrogen, oxygen, selenium, nitrogen and noble gases.

1. Most non-metals are brittle and are not malleable or ductile.
2. At room temperature, they are usually solids or gases.
3. They usually have low boiling and melting points (except carbon and boron).
4. They are poor conductors of heat and electricity.
5. They are usually less dense when compared to metals.
6. They tend to gain electrons during chemical reactions.

$\mathbb\green{USES}$

1. Nitrogen is used in the manufacture of fertilizers.
2. Sulphur is used for the vulcanization of rubber. It is used in the preparation of sulfur drugs and ointments. It is an important constituent of gunpowder.
3. Phosphorus is used in the match industry and in the manufacture of fireworks.
4. Graphite is used for making electrodes and crucibles for laboratory use. It is used as a lubricant in machinery and for making fuel rods in nuclear reactors.

$\mathbb\purple{ANSWER 04}$

$\mathbb\pink{METALLOIDS}$

Elements presentbetween metals and non metalstermed as semimetals or metalloids. These will have the combined properties of both metals and nonmetals.

• Metalloids display some properties of metals as well as of non-metals. Hence, they are also known as semi-metals.
• Boron, silicon, germanium, arsenic, antimony, and tellurium are the most ordinarily recognized metalloids.
• These elements move diagonally across the Periodic Table.
• They may have a metallic or dull appearance.
• They are usually brittle and are fair conductors of electricity. They may gain or lose electrons during chemical reactions.
• They form alloys with metals.
• They are used as catalysts, biological agents, flame retardants, alloys and semiconductors in industries due to their unique properties.

$\mathbb\green{USES}$

Likecompounds of antimony and arsenic are known to be especially toxic. However, boron, arsenic, and silicon are extremely important trace elements.The four elements boron, arsenic, silicon, and antimony are known to have many medical uses. The remaining two elements (germanium and tellurium) are known to have great potential for medicinal applications.

Furthermore, boron is used in herbicides and also in insecticides and. This element is an active trace element, which has several antiseptic, antiviral, and antifungal properties in the form of boric acid.

$\huge\mathbb{\purple{ドラえもんバツ のび太}}$