Kawaii metal (also known as idol metal, cute metal, or kawaiicore) is a musical genre that blends elements of heavy metal and J-pop that was pioneered in Japan in the early 2010s. The genre combines both Eastern and Western influences that appeal to both cultures.
Full Answer
What is Kalai coating?
The art of kalai (kalhai or qalai) is the process of coating an alloy surface such as copper or brass by deposition of metal tin on it. [1] The word "kalai" is derived from Sanskrit word kalya lepa, which means "white wash or tin". [2]
What is Kalai made of?
Virgin grade tin (called ‘ranga’ in Hindi ), caustic soda, sal ammoniac or ammonium chloride (called ‘nausadar’ powder in Hindi), and water are used in the process. [6] The first step of kalai is to clean the utensil with water. There are two ways of cleaning the utensil further to remove any impurities such as dust.
Who are Kalaigars or kalaiwalas?
A cultural Sanskrit work by Keladi Basava called "Sivatattva Ratnakara" (1699) mentions "kalaya-lepa" in the chapter of cookery or " supashashtra " which means applying kalai on utensils. [2] People practicing the art of kalai are called Kalaiwala or Kalaigar. [3] Basically, Kalaigars or Kalaiwalas are community craftsmen. [4]
Why are copper vessels with Kalai used to store water?
[2] The copper vessels with kalai were used to store water and cook food earlier because of a spiritual belief that copper attracts and transmits a divine consciousness also called “Chaitanya”. [5]
What is the definition of an alkali metal?
The alkali metals are six chemical elements in Group 1, the leftmost column in the periodic table. They are lithium (Li), sodium (Na), potassium (K...
Why are they called the alkali metals?
The alkali metals are so named because when they react with water they form alkalies. Alkalies are hydroxide compounds of these elements, such as s...
What are some properties of the alkali metals?
The alkali metals have low melting points. Lithium melts at 180.5 °C (356.9 °F); cesium melts at just 28.4 °C (83.1 °F). These elements are also ex...
What is the most common alkali metal?
The most common alkali metal is sodium, which is 2.8 percent of Earth’s crust. The most common sodium compound is sodium chloride (NaCl), salt. The...
Which alkali metals are rarer?
The other alkali metals are much rarer. Rubidium, lithium, and cesium are 0.01, 0.002, and 0.0007 percent of Earth’s crust, respectively. Francium is radioactive, and only minute amounts of it exist in nature. Sodium.
What is the lustre of alkali metals?
The alkali metals have the silver-like lustre, high ductility, and excellent conductivity of electricity and heat generally associated with metals. Lithium is the lightest metallic element. The alkali metals have low melting points, ranging from a high of 179 °C (354 °F) for lithium to a low of 28.5 °C (83.3 °F) for cesium. Alloys of alkali metals exist that melt as low as −78 °C (−109 °F).
Why are alkali metals called alkali metals?
The alkali metals are so called because reaction with water forms alkalies (i.e., strong bases capable of neutralizing acids ). Sodium and potassium are the sixth and seventh most abundant of the elements, constituting, respectively, 2.6 and 2.4 percent of Earth’s crust. The other alkali metals are considerably more rare, with rubidium, lithium, ...
What is the melting point of alkali metals?
The alkali metals have low melting points, ranging from a high of 179 °C (354 °F) for lithium to a low of 28.5 °C (83.3 °F) for cesium. Alloys of alkali metals exist that melt as low as −78 °C (−109 °F).
What are alkali compounds?
Alkalies are hydroxide compounds of these elements, such as so dium hydroxide and potassium hydroxide. Alkalies are very strong bases that are caustic. Lye, for example, is sodium hydroxide. Alkalies react with acids to form salts. Base.
What is the use of lithium batteries?
An important use of lithium is in the construction of lightweight batteries. Primary lithium batteries (not rechargeable) are widely used in many devices such as cameras, cellular telephones, and pacemakers.
Is potassium a free metal?
Potassium has considerably less use than sodium as a free metal. Potassium salts, however, are consumed in considerable tonnages in the manufacture of fertilizers. Lithium metal is used in certain light-metal alloys and as a reactant in organic syntheses.
What metals did the Alkali Metals table put together?
His table placed hydrogen with the halogens.
What is the name of the metal inside the material?
He named the metal inside the material " lithium ". Lithium, sodium, and potassium were part of the discovery of periodicity, as they are among a series of triads of elements in the same group that were noted by Johann Wolfgang Döbereiner in 1850 as having similar properties.
How do alkali metals increase their reactivity?
This is the result of a combination of two factors: the first ionisation energies and atomisation energies of the alkali metals. Because the first ionisation energy of the alkali metals decreases down the group, it is easier for the outermost electron to be removed from the atom and participate in chemical reactions, thus increasing reactivity down the group. The atomisation energy measures the strength of the metallic bond of an element, which falls down the group as the atoms increase in radius and thus the metallic bond must increase in length, making the delocalised electrons further away from the attraction of the nuclei of the heavier alkali metals. Adding the atomisation and first ionisation energies gives a quantity closely related to (but not equal to) the activation energy of the reaction of an alkali metal with another substance. This quantity decreases going down the group, and so does the activation energy; thus, chemical reactions can occur faster and the reactivity increases down the group.
What are the elements in the alkali metals?
t. e. The alkali metals consist of the chemical elements lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (Fr). Together with hydrogen they constitute group 1, which lies in the s-block of the periodic table.
Why do alkali metals not exist?
The alkali metals, due to their high reactivity , do not occur naturally in pure form in nature. They are lithophiles and therefore remain close to the Earth's surface because they combine readily with oxygen and so associate strongly with silica, forming relatively low-density minerals that do not sink down into the Earth's core. Potassium, rubidium and caesium are also incompatible elements due to their large ionic radii.
Why are the ionic radii of alkali metals smaller than the atomic radii?
This is because the outermost electron of the alkali metals is in a different electron shell than the inner electrons, and thus when it is removed the resulting atom has one fewer electron shell and is smaller. Additionally, the effective nuclear charge has increased, and thus the electrons are attracted more strongly towards the nucleus and the ionic radius decreases.
How do alkali metals affect the atomic radius?
In the alkali metals, the outermost electron only feels a net charge of +1, as some of the nuclear charge (which is equal to the atomic number) is cancelled by the inner electrons; the number of inner electrons of an alkali metal is always one less than the nuclear charge. Therefore, the only factor which affects the atomic radius of the alkali metals is the number of electron shells. Since this number increases down the group, the atomic radius must also increase down the group.
