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Several of the CPK colors refer mnemonically to colors of the pure elements or notable compound. For example, hydrogen is a colorless gas, carbon as charcoal, graphite or coke is black, sulfur powder is yellow, chlorine is a greenish gas, bromine is a dark red liquid, iodine in ether is violet, amorphous phosphorus is red, rust is dark orange-red, etc.
Onfim left seventeen known birch bark items. Twelve of those have illustrations, five only text. One of the drawings features a knight on a horse, with Onfim's name written next to him, stabbing someone on the ground with a lance, with scholars speculating that Onfim pictured himself as the knight.
A silverpoint drawing is made by dragging a silver rod or wire across a surface, often prepared with gesso or ground of Chinese white.Silverpoint is one of several types of metalpoint used by scribes, craftsmen and artists since ancient times.
A mnemonic is a memory aid used to improve long-term memory and make the process of consolidation easier. Many chemistry aspects, rules, names of compounds, sequences of elements, their reactivity, etc., can be easily and efficiently memorized with the help of mnemonics.
Chemistry is the scientific study of the properties and behavior of matter. [1] It is a physical science within the natural sciences that studies the chemical elements that make up matter and compounds made of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during reactions with other substances.
The following outline acts as an overview of and topical guide to chemistry: . Chemistry is the science of atomic matter (matter that is composed of chemical elements), especially its chemical reactions, but also including its properties, structure, composition, behavior, and changes as they relate to the chemical reactions.
Elements of art – group of aspects of a work of art used in teaching and analysis, in combination with the principles of art. They are texture, form, line, color, value, and shape. Perspective – the principle of creating the illusion of 3-dimensionality on a 2-dimensional source such as paper.
An engineering drawing is a type of technical drawing that is used to convey information about an object. A common use is to specify the geometry necessary for the construction of a component and is called a detail drawing.