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Periodic Videos (also known as The Periodic Table of Videos) is a video project and YouTube channel on chemistry. It consists of a series of videos about chemical elements and the periodic table , with additional videos on other topics in chemistry and related fields.
Each chemical element has a unique atomic number (Z— for "Zahl", German for "number") representing the number of protons in its nucleus. [4] Each distinct atomic number therefore corresponds to a class of atom: these classes are called the chemical elements. [5] The chemical elements are what the periodic table classifies and organizes.
Juan Sánchez Cotán, Still Life with Game Fowl, Vegetables and Fruits (1602), Museo del Prado, Madrid. A still life (pl.: still lifes) is a work of art depicting mostly inanimate subject matter, typically commonplace objects which are either natural (food, flowers, dead animals, plants, rocks, shells, etc.) or human-made (drinking glasses, books, vases, jewelry, coins, pipes, etc.).
When van Gogh created still life paintings he was able to explore light and its effect on colors. A close-up of the bottle in Still Life with Straw Hat reveals that way in which van Gogh used varying shades of the same color to depict how light would fall, or be shaded, in the everyday items he painted from home or the garden. [4]
A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z). [ 1 ] The definitive visualisation of all 118 elements is the periodic table of the elements , whose history along the principles of the periodic law was one of the founding ...
Table setting (laying a table) or place setting refers to the way to set a table with tableware—such as eating utensils and for serving and eating. The arrangement for a single diner is called a place setting. It is also the layout in which the utensils and ornaments are positioned.
Helium is an s-element, but nearly always finds its place to the far right in group 18, above the p-element neon. Each row of the table has two s-elements. The metals of the s-block (from the second period onwards) are mostly soft and have generally low melting and boiling points. Most impart colour to a flame.
Still Life with Apples, Pears, Lemons and Grapes (F382) was Van Gogh's opportunity to explore Blanc's recommendation about combining colors: "If one brings together sulfur (yellow) and garnet (dark red), which is its exact opposite, being equidistant from nasturtium (orange) and campanula (blue-mauve), the garnet and sulfur will excite one ...