Elements for Kids

Fluorine is the first element of the halogen group and occupies the 17th row of the periodic table. The fluorine atom has nine electrons and nine protons. It is a quite rare element in the universe, but it is the 13th largest element in the Earth's crust.

The most striking feature of fluorine is that it is the most reactive of all the elements. This is dangerous and makes handling difficult. It reacts with almost all other elements. It is also the most electronegative among the elements, which means that it attracts electrons towards itself.

Under standard conditions, fluorine forms a gas composed of two fluorine atoms called dual atom gases. Pale yellowish green with irritating smell

Fluoride is toxic to humans and highly corrosive. Many reactions with fluorine are suddenly explosive. Fluorine burns various compounds and elements including water, copper, gold, steel

Since it is very reactive, fluorine does not appear as a natural free element. Fluorite, fluoroapatite, cryolite etc, can easily be found in the crust mineral. The main source of commercially available fluorine is fluorite (also known as fluorite). The majority of world fluorite is provided by China and Mexico.

One of the most common uses of fluorine is refrigerant gas. Chlorofluorocarbons (CFCs) have been used for refrigerators and air conditioners for many years. Today they are banned as they destroy the ozone layer. However, many alternative gases still contain fluorine

Other uses are fluoride. Fluoride is a reduced form of fluorine when combined with other elements. Fluoride is useful for prevention of dental caries, and it is used for tap water and toothpaste

Other applications that use fluorine include high temperature plastics such as Teflon (R), smelting of iron and metal production, pharmaceuticals, etching glass, and treatment of nuclear fuel.

Other chemists suspected that unknown elements were present in the complex hydrofluoric acid, but French chemist Henri Moisan succeeded in isolating this element for the first time in 1886.

The name fluorine is derived from mineral fluorite. It comes from the Latin "Fleure", which means "flow". The name was proposed by British chemist Sir Humphrey David.

The bond formed between carbon and fluorine to produce fluorocarbon is the strongest bond in organic chemistry and is very stable.

Because 铯 is the element with the lowest electronegativity, it is sometimes called the opposite element of fluorine.

Just as Spy Kids is looking for a Transmooger exchange that could destroy the world, dialogue has some sort of self-deception. "That's there!" Carmen exclaimed. "How do you understand," Juni asked. Together with "Spy Kids 2: Island of Lost Dream", the Spy Kid series is positioned as a permanent part of the movie industry: "James Bond Kids Show . "Spy Kids 9", Alexa Vega and Daryl Sabara are promoting parents, Antonio Banderas and Carla Gugino as grandparents, and imagine the children who have not yet been born in that role.

This course starts with a brief introduction and asks children (8 to 10 years old) and what we know about what we call drama technology. In other words, what is the technical element of drama production? The children are sitting at the end of the seat and holding hands ... One child says "light" and the other is blurred; "background one" comes from the second line - passion Shy voice; a shy boy muttered to himself; quietly "rings" behind his binder. At the beginning of the conversation, I started talking about the various elements that make up the drama technique.

Summer camps begin in earnest, children begin experiencing camping, are busy, and enrich their thoughts throughout the summer. Some children come to the camp in the theater. The camp I'm working on is not just about the musical performance elements, but children also understand well the technical elements of the theater production. Let's start introducing light and sound! This course starts with a brief introduction and asks children (8 to 10 years old) and what we know about what we call drama technology. In other words, what is the technical element of drama production? The children are sitting at the end of the seat and holding hands ... One child says "light" and the other is blurred; "background one" comes from the second line - passion Shy voice; a shy boy muttered to himself; quietly "rings" behind his binder. At the beginning of the conversation, I started talking about the various elements that make up the drama technique.