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Do Now:

Do Now:. What are the three sub-atomic particles of an atom and their charges? Which sub-atomic particles make up the nucleus of the atom?. The Periodic Table. Unit 5: Structure of Matter. Take five minutes:.

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Do Now:

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  1. Do Now: What are the three sub-atomic particles of an atom and their charges? Which sub-atomic particles make up the nucleus of the atom?

  2. The Periodic Table Unit 5: Structure of Matter

  3. Take five minutes: • Group the following list of songs/artist in the way that makes the most sense to you: • Today was a fairy tale by Taylor Swift • Tik Tok by Kesha • Imma Be by Black Eyed Peas • Carry Out by Timbaland ft. Justin Timberlake • BedRock by Young Money and Lloyd • Bad Romance by Lady Gaga • Baby by Justin Bieber ft. Ludacris • Replay by Iyaz • How low by Ludacris

  4. Think Pair Share: Pair with someone next to you, and quietly (really) compare how you guys grouped those songs. What characteristics did you use to organize the songs? What other ways could you have organized those songs?

  5. How is the Periodic Table organized? An Element is a substance made of one type of atom. There are 117 different types of elements. Examples are hydrogen, copper, helium, oxygen, etc. In the 1800’s, scientists decided to organize the elements according to their properties However, none of the suggested methods worked very well…until….

  6. And the Periodic Table was born… In 1860, a Russian chemist Dmitri Mendeleev began writing all the elements on notecards with their atomic mass, and any properties. He began listing them, organizing them so that going down a column the elements had similar properties In 1869, he produced the first periodic table. It is called the periodic table because it shows a periodic, or repeating pattern, of properties

  7. The modern Periodic Table The periodic table organizes the atoms of elements by similar properties and atomic number ***The difference between one element and another element is the # of protons (atomic number) in that element

  8. How to read the periodic table: Element name Atomic number Element symbol Atomic mass

  9. Element name: the scientific name of the element Atomic number: number at the top of the box, represents the # of protons in the nucleus Element Symbol: abbreviation of the element’s name Atomic Mass: average mass of all the isotopes of that element (protons+neutrons)

  10. Trends and Patterns in the table • In the vertical columns are known as groups (and they are numbered) • They show similarities in their chemical and physical properties • Famous Group 17 – halogens. Halogens tend to combine easily with other elements or compounds • Famous Group 18 – Nobel gases.

  11. Trends and Patterns in the table • Each horizontal row is called a period • Properties of elements change in a predictable way from one end of a period to another

  12. Atomic Size Decreases Atomic Size/Density Increases

  13. Now let’s practice See Atomic Calculations Worksheet

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