Chimie - fiche de révision

Résumé du document

Dans ce résumé, vous trouverez mon résumé pour mon examen de chimie que j'ai passé en 3? secondaire en ASO en anglais.

Extraits

[...] This makes the noble gasses unreactive or chemically inert. The typical 8-electron structure is called the octet structure. Because of the 2 electrons in helium it is generally better to speak of noble gas configuration. Elements of which the atoms tend to form + ions are called electropositive elements. Elements of which the atoms tend to form - ions are called electronegative elements. The naming of positively charged ions is simple: Name of the metal + ion The naming of negatively charged ions is as follow: Stem of the name of the non-metal (From the Latin name) + ide + `ion' Metals are electropositive ▪ How bigger the radius of an atom (the more shells), the more the atom is electropositive. [...]

[...] Another way in which atoms obtain a stable electron structure is through metallic bonding as found in metals. There are thus 3 types of bonds that can be distinguished. The naming of these molecules is simple: the numeral followed by the name of the element. Dissocation equation of an ionic compound Giant molecular structures Unit 6 Physical and chemical phenomenon Sometimes the substances do not change (e.g. heating a nail, melting candle wax): this is called a physical phenomenon. Sometimes the substances change, and new substances are formed (e.g. heating magnesium): this is called a chemical phenomenon. [...]