Water is also a molecule because it is made from atoms that have been chemically combined. Not all molecules are compounds, since some molecules, such as oxygen gas (above image of molecule of-O 2) or ozone (O 3), consist only of one element or type of atom. If the types of atoms are different from each other, a compound is formed. While all compounds are molecules, not all molecules are compounds.Ī molecule is formed when two or more atoms of an element chemically join together. Examples of homonuclear diatomic molecules are: carbon monoxide, hydrocholoric acid (HCl), and Hydrogen Flouride (HF)ĬARBON MONOXIDE MOLECULE (CO) WHAT IS THE DIFFERENCE BETWEEN A MOLECULE AND A COMPOUND? OXYGEN MOLECULE Homonuclear diatomic molecules -A homonuclear diatomic molecule consists of two atoms of different elements chemically combined. These seven elements are so reactive that they can be found very often bonded with another atom of the same type. There are seven diatomiceElements: Hydrogen (H 2), Nitrogen (N 2), Oxygen ( O 2), Fluorine ( (F 2), Chlorine ( (Cl 2), -Iodine ( (I 2) and Bromine (Br 2). Heteronuclear Diatomic Molecules - A heteronuclear diatomic molecule consists of two of atoms of the same element combined. Examples of diatomic molecules are O 2 and CO. TYPES OF MOLECULESĭiatomic Molecules - A diatomic atom is composed of only two atoms, of the same or different chemical elements. A molecule may be homonuclear, which means, it consists of atoms of one chemical element, as with oxygen (O 2) or it may be heteronuclear, a chemical compound composed of more than one element, as with water (H 2O). When heated, the ores produced poisonous fumes.A molecule is defined as two or more atoms of the same element different element that are bound together. Smelters weren’t fond of the ores either. The miners thought the cruel kobold had changed the silver into worthless rocks. Cobalt comes from the German word ‘kobold’ – small mountain elves or goblins. She used several other names – magnesia, wismuth or the secretive ‘minera’ – even though German miners had earlier coined the word cobalt to describe the ores she studied. Wallich never used the word cobalt in her books. In spite of her detailed research Wallich, like the other chymists, was unable to create the philosophers’ stone. Wallich became a much sought-after chymist following the publication of her books. When heated and cooled, the compounds have colours ranging from rose, violet blue, sky blue and grass green. She is credited with discovering and reporting many thermochromic effects of cobalt compounds. Wallich’s books describe numerous chemical reactions in detail.
Wallich’s goal was to produce the philosophers’ stone – a substance that could turn base metals such as lead and tin into silver and gold. Dorothea Juliana Wallich was interested in chymistry (a term that covers both alchemy and chemistry).
Thirty years prior to Georg Brandt’s published account of separating cobalt from bismuth, a young German woman had already published three books about her research using ores that contained cobalt. Chymical research and the philosophers’ stone
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