Which alkali metal belongs to the sixth period

Palladium Why do all the members of a group have similar properties? Within a period, what happens to the atomic radius as the atomic number increases?

It often becomes less What happens to the electronegativity as you move from left to right across the periodic table? It often becomes greater. Where, generally, are the metals located on the periodic table? Two thirds of the table starting from the left. Where, generally, are the nonmetals located on the periodic table?

One third the table starting from the right. List the elements. Bankai's Derek Leong. Steve M Hall. Dianna Hamby. Rita Dimas. Amala Rose Babychan. Akhmad Safrin. Faiyaz Rabby Alvi. Arth Lubay.

Walid Ebaied. Rabia Fiaz. Nahian Sabur. Lainnya Dari NihalAbou-Ghaly. Ishneet Dhillon. Populer di Atomic Radius. Kultar Deep Singh Sandhu. Muhammed Musab. Khairiyah Abdullah. Desmond Chin. Puneet Agarwal. Subhasish Sau. Deep Adhia. Abigael Jhem Soriano Artuz. Kushal Kholgade. Nilesh Gupta. Kanhai Leishangthem. Yting Tan. These salts dissociate less easily in water than the salts of sodium and potassium, and are therefore less soluble in water.

In addition, lithium can form bonds to carbon which have high covalent character the organolithium compounds. Lithium was one of the three elements produced in the Big Bang, although it was produced only in trace amounts. Aluminum and magnesium alloys of lithium are strong and lightweight; aluminum-lithium alloys are used in aircraft construction, trains, and bicycles. Lithium-based batteries have very long lifetimes particular important in implantable devices such as pacemakers and defibrillators , and are very lightweight; they are frequently used in portable electronic devices and computers.

Lithium salts such as lithium carbonate, Li 2 CO 3 are used in the treatment of bipolar disorder and some types of depression, and are also used to augment the actions of other antidepressants.

Lithium deuteride LiD, see entry on Hydrogen above is used in hydrogen bombs; neutrons produced by a fission-powered explosive are absorbed by the lithium atoms, transforming them into tritium; the fusion of tritium and deuterium to form helium releases tremendous amounts of energy. Lithium hydroxide LiOH is used in confined spaces to remove carbon dioxide from the air the carbon dioxide is captured in the form of lithium carbonate ; this is particularly important in submarines and spacecraft.

Sodium is a soft, silvery metal that reacts very vigorously with water, and tarnishes easily in air. It is the fourth most abundant element in the Earth's crust, which consists of 2. The name is derived from the English word soda, a term found in many compounds of sodium, such as washing soda sodium carbonate or soda ash , sodium bicarbonate baking soda , and sodium hydroxide caustic soda. The symbol "Na" is derived from the Latin name for the element, natrium. It is found in the minerals halite [rock salt, or sodium chloride, NaCl] and trona [sodium carbonate bicarbonate, Na 3 CO 3 HCO 3 ], and can be extracted from seawater.

Metallic sodium is usually stored in mineral oil or some other hydrocarbon, because it will react with the moisture in the air to form sodium hydroxide. A common laboratory demonstration illustrates the reactivity of sodium. A small piece of sodium placed in a dish of water skates around on the surface of the water, hissing violently, and slowly disappears.

The sodium reacts with water in a single-displacement reaction, producing sodium hydroxide and hydrogen gas:. The sodium hydroxide is soluble in water, and dissolves. This demonstration can become very dangerous if too large a piece of sodium is used, however, since enough heat can be generated to ignite the hydrogen gas. This reaction releases a great deal of heat energy, and is usually done in a beaker lined with sand to prevent the heat from cracking the glass. See here for a demonstration.

Energetically excited sodium atoms glow with a yellow light the strongest emissions are the "sodium D-lines" at Sodium is also used in sodium-vapor street lamps.

In the body, sodium ions regulate osmotic pressure and blood pressure, and sodium and potassium ions together play a major role in the transmission of nerve impulses. One of the most important compounds of sodium is sodium chloride, NaCl, also known as table salt.

Commercially prepared sodium chloride is either mined in the form of halite, from deposits formed by ancient, dried-out sea beds, or by the evaporation of water from sea water. Sodium chloride is subjected to electrolysis in an apparatus called a Downs cell, which produces sodium metal and chlorine gas; the construction of the cell is designed to keep the sodium and chlorine separate from each other as they are produced.

Sodium carbonate, Na 2 CO 3 , also known as soda or soda ash, has been used for centuries in washing clothes it helps to remove highly charged metal cations, such as calcium and magnesium, from hard water and in the manufacture of glass, paper, and detergents. Sodium hydroxide, NaOH, also known as caustic soda or lye, is a strong base; it is used in drain cleaners, and in the manufacture of detergents sodium hydroxide breaks down triglycerides — fats and oils such as lard, shortening, olive oil, vegetable oils, etc.

Sodium bicarbonate, NaHCO 3 , also known as sodium hydrogen carbonate, is the main ingredient in baking soda, and is used as a leavening agent in the making of bread and other baked goods. Potassium is a soft, silvery metal that reacts extremely vigorously with water, and tarnishes rapidly in air. Its name is derived from the English word "potash," for potassium carbonate, a compound found in high concentrations in wood ashes.

The symbol "K" is derived from the Latin name for the element, kalium. Potassium is the eighth most abundant element in the Earth's crust 2. Potassium is essential for plant growth, and is heavily used in fertilizers. In the body, potassium plays a vital role in the contraction of muscle tissue; the movement of sodium and potassium ions in nerve cells plays a major role in the transmission of nerve impulses.

When heated, potassium salts glow with a purple color, and are used in fireworks. Like sodium, metallic potassium is usually stored under mineral oil or some other hydrocarbon; it can also react with oxygen in dry air to produce potassium superoxide, KO 2 see below. Potassium undergoes a a reaction with water similar to that of sodium; the products of the reaction are potassium hydroxide and hydrogen gas.

This reaction releases a great deal of heat energy, often igniting the hydrogen gas that is produced. Potassium, which accounts for 0. It undergoes electron capture to produce argon; a comparison of the ratio of potassium to argon in rocks can be used to determine the age of the rock potassium-argon dating. Trace amounts of potassium are found in all sources of potassium; in a typical human, about , atoms of potassium decay every second.

The energy released by the decay of potassium is partially responsible for the interior heat of the Earth, along with the decays of thorium and uranium. There are a number of widely-used compounds of potassium. Potassium chloride, KCl, is used in salt substitutes mixed with sodium chloride to improve its flavor , and in fertilizers; massive amounts of potassium chloride are used in lethal injections to cause rapid death by cardiac arrest.

Potassium carbonate, K 2 CO 3 , also known as potash, is used in the manufacture of glass. Potassium hydroxide, KOH, also known as caustic potash, is used in making soaps and detergents. Potassium nitrate, KNO 3 , also known as saltpeter, is a powerful oxidizer, and is one of the ingredients of gunpowder. Potassium chlorate, KClO 3 , is a very powerful oxidizer, and is used in match heads and fireworks.

Potassium superoxide, KO 2 , reacts with carbon dioxide to produce potassium carbonate and oxygen gas; it is used in rebreathers and respiration equipment to generate oxygen, and is also used in mines, submarines, and spacecraft. Rubidium is a soft, white metal; it is similar to sodium and potassium in its reaction with water, but the reaction is even more violently exothermic. Its name is derived from the Latin word for deep red ruby , rubidius.

Congress government when came in power in abandoned the sixth FYP and launched a new sixth FYP for period The plan for period, , is called the rolling plan. Mohammad Hidayatullah was the sixth Vice-President of India. His period in office was 31 August - 30 August Log in. Alkali Metals. Study now.

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