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The Periodic Table

The periodic table is a tabular arrangement of the chemical elements, ordered by their atomic number, electron configurations, and recurring chemical properties. The table can be used to derive relationships between the properties of the elements, and predict the properties of elements yet to be discovered or synthesized.


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Video Transcript

the periodic table is organized so that the brutal number and mass a sense from left to right. So in this specific periodic table, we don't have the mass. But we do have the proton number, and you can see, um, that generally as you go along each row from left to right and continue each robe as you go down the periodic table. The proton number increases. So when you look at other periodic tables, which have more information than this one, um, you'll see that for each element you have the atomic number, which is the number of protons, as well as the chemical symbol and the name of the elements written below Azaz well as the atomic weight, which is often in grams per mole or an AM you. And so uh, throughout the course, we'll be using the periodic table on to obtain for information like the atomic number as well as the atomic mass of each atom. And it's also important to note that the periodic table is organized in groups and periods, so groups run down vertically and periods run horizontally from left to right on the periodic table, and groups generally have similar properties due to the number of Valence electrons that it has, which plays a significant role in bonding properties. Trends along groups and periods help us predict bonding properties of atoms, which will be discussed later in the course.