Periodic table explained: video on the name origin – how the periodic table got its name?
his video shows how there are 92 naturally occurring elements, one for each kind of atom, and how scientists originally sorted into a list according to their weights of their atoms.
Distinct repeating patterns were noticed along this list, from metals to semi-metals to non-metals. Based on these repeating, or periodic, patterns, this list was divided into 7 separate rows of elements that were arranged vertically under each other in a table format. Many notable elements and their properties are shown in this video.
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Atomic School supports the teaching of Atomic Theory to primary school & science students .
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The founder of Atomic School, Ian Stuart, taught Chemistry and Physics for 25 years at senior levels before he realized that his 8-year old son, Tom, could understand Atomic Theory at a much deeper level than he expected. After visiting Tom’s class at school, he discovered that his peers could also grasp the abstract scientific concepts, as well as apply it usefully to the real world.
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Perhaps the most important document in science is The Periodic Table of the Elements. But how did it get its name? In this video, we’ll explain how its 3 key words were chosen. Periodic, Table, and Elements. We’ll start with elements.
It took thousands of years for scientists to discover all 92 different kinds of atoms that exist. 101.1 Each kind makes a different substance. Because a substance made of only ONE kind of atom is called an element, there are 92 elements in the universe.
Scientists made a list using the weights of their atoms, starting with the lightest, hydrogen, to the heaviest uranium. They gave each element its own number showing its place in this list. Scientists called this the Atomic Number. So the Hydrogen must have an Atomic Number of 1, and Uranium an Atomic Number of 92. Later scientists made some heavier atoms in the lab, so the modern list goes up to 118.
Scientists noticed something going along the list of elements. The first two elements on the list, Hydrogen and Helium, are both light colourless gases. Although they look alike, when we put a lighted match to Hydrogen, it explodes. But when we light up Helium, it just puts out the flame. We can say that Hydrogen is chemically reactive, whereas Helium is chemically unreactive, or inert.
After Helium there’s an abrupt change to Lithium which is a soft, shiny metal. Beryllium is a shiny metal too, but a bit harder.