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Periodic Table - First Twenty Elements

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Published on Aug 18, 2012

We need to learn the names and symbols for the first twenty elements on the periodic table. We'll begin by looking at elements of row two. So if you open up your text book to the front cover, you'll notice that there is a periodic table. Go ahead and open up your textbook and follow along. When we look at a periodic table we can see that boron, carbon, nitrogen, oxygen, fluorine and neon are all elements of row two. We can see that B C N O F spells out "B a C N O F" [bacon off]. Bacon off on your knee [Ne]. Students have a tendency to laugh at that so we can put "He He He" above neon. We can see from out periodic table, hydrogen and helium are in row one. In row two, we have "B a C N O F" on your "Ne" but we also have lithium and beryllium. Here are the first 10 elements of the periodic table. Hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine and neon. Elements of row three, begin with sodium, followed by magnesium, aluminum, silicon, phosphorus, sulfur, chlorine, argon. Elements of row four begin with potassium followed by calcium. I am going to have you come up with your own pneumonic for memorizing the positions for the elements in row three and row four. I also want to note that elements are arranged by increasing atomic number within rows, but elements also fall within vertical columns. These vertical columns are called groups. There are eight groups across. We have groups one, two, three, four, five, six, seven and eight. We will soon discover that knowing an element's group number will be important to understanding structure and bonding as well as understanding that elements fall within rows or periods. It is very important that students commit this picture for the first twenty elements of the periodic table to memory. We will be extracting data from this picture to help us better understand models for the atom and for understanding structure and bonding later in the semester. So again, please learn the names and symbols for the first twenty elements on the periodic table, their general location, the fact that elements reside in rows and in vertical columns also known as families. Again , our general picture began with B C N O F, bacon off [ B a C N O F] on your knee [Ne] which we thought was funny and we laughed noting that hydrogen was in the same row as helium, and under hydrogen we had lithium followed by beryllium. This is very important picture, please commit it to memory. We will be referring back to this picture throughout the entire semester.

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