Question

which is most reactive metal​

Answer 1

Answer:

caesium

Explanation:

caesium is the most reactive metal in the periodic table,reacts extremely violently

Answer 2

Answer:

Caesium

Caesium or cesium is a chemical element with the symbol Cs and atomic number 55. It is a soft, silvery-golden alkali metal with a melting point of 28.5 °C (83.3 °F), which makes it one of only five elemental metals that are liquid at or near room temperature.

• Symbol: Cs
• Atomic number: 55
• Electron configuration: [Xe] 6s1
• Melting point: 28.44 °C
• Atomic mass: 132.90545 u
• Van der Waals radius: 343 pm

Explanation:

$\bold \pink{LET'S \: EXPLORE \: MORE}$

What are Metals?

Metals are minerals or substances that form naturally below the surface of the Earth. Most metals are lustrous or shiny. Metals ate inorganic, which means they are made of substances that were never alive.

$\bold\blue{Types \: of \: Metals}$

Metal Elements

Lithium

Beryllium

Sodium

Magnesium

Aluminium

Potassium

Calcium

Scandium

Titanium

Vanadium

Chromium

Manganese

Iron

Cobalt

Nickel

Copper

Zinc

Gallium

Rubidium

Strontium

Ruthenium

Rhodium

Palladium

Silver

Cadmium

Indium

Cesium

Barium

Lanthanum

Cerium

Praseodymium

Neodymium

Promethium

Samarium

Europium

Gadolinium

Terbium

Platinum

Gold

Mercury

Lead

Bismuth

Polonium

Francium

Radium

Actinium

Thorium

Protactinium

Uranium

Neptunium

$\bold \blue{Physical \: Properties \: of \: Metals}$

• All the metals are good conductors of heat and electricity. Cooking utensils and irons are made up of metals as they are good conductors of heat.

• Ductility is the ability of the material to be stretched into a wire. This ability allows metals to be drawn into wires and coupled with their durability, find applications as cable wires and for soldering purposes. Because Metals can be drawn into wires we can say that metals are ductile.

• Malleability is the property of substances which allows them to be beaten into flat sheets. Aluminium sheets are used in the manufacturing of Aircraft because of their lightweight and strength. Other metals sheets are used in automobile industries, for making utensils, etc. Therefore, metals are malleable.

• Metals are sonorous because it produces a deep or ringing sound when struck with another hard object.

• Usually, all the metals have a shiny appearance but these metals can also be polished to have a shiny appearance.

$\bold \blue{Chemical \: properties \: of \: Metals}$

• Reaction with water: Only highly reactive metals react with water and not all the metals. For example, Sodium reacts vigorously with water and oxygen and gives a large amount of heat in the process. This is why sodium is stored in kerosene so that it does not come in contact with moisture or oxygen.

• Reaction with acids: Hydrogen gas is produced when metals react with acids. For example, when zinc reacts with hydrochloric acid it produces zinc chloride and hydrogen gas.

• Reaction with bases: Not all the metals react with bases and when they do react, they produce metal salts and hydrogen gas. When zinc reacts with strong sodium hydroxide it gives sodium zincate and hydrogen gas.

• Reaction with oxygen: Metal oxides are produced when metals burn in the presence of oxygen. These metal oxides are basic in nature. For example: When magnesium strip is burned in the presence of oxygen it forms magnesium oxide and when magnesium oxide dissolves in water it forms magnesium hydroxide.

$\bold\pink{FURTHER \: LEARNING}$

$\bold \blue{What \: is \: Non-Metal?}$

Non-metals are the elements which form negative ions by accepting or gaining electrons. Non-metals usually have 4, 5, 6 or 7 electrons in their outermost shell.

List of Non-Metals

Hydrogen

Nitrogen

Oxygen

Fluorine

Chlorine

Bromine

Iodine

Carbon

Sulfur

Phosphorous

Silicon

$\bold\blue{Physical \: Properties \: of \: Non-Metals}$

• Ductility is the property of the material to be stretched into wires but non-metals are not ductile except for carbon, as carbon fibres find uses in a wide variety of industries including sports and music equipment.

• Another property characteristic to metals is absent in non-metals called malleability. They can’t be drawn into sheets are they are brisk and break on applying pressure.

• They are not lustrous as they do not have any shiny appearance.

• They are not sonorous and do not produce a deep ringing sound when they are hit with another material. They are also bad conductors of heat and electricity except for graphite.

$\bold \blue{Chemical \: Properties \: of \: Non-Metals}$

$\green{Reaction \: with \: Water}$

Non-metal does not react with water but it is usually very reactive in air, which is why some of them are stored in water. For example, one of the highly reactive non-metals is phosphorus and it catches fire when exposed to air that is why it is stored in water to prevent its contact with atmospheric oxygen.

$\green{Reaction \: with \: Acids}$

None of the non-metals is known to react with acids.