Objective: describe how the elements are arranged in the periodic table December 8 Do Now: try to solve the elemental puns (NEXT slide)…make sure to.

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Presentation transcript:

Objective: describe how the elements are arranged in the periodic table December 8 Do Now: try to solve the elemental puns (NEXT slide)…make sure to write down your answers on your do now sheet! *Take out your periodic table! Homework: watch video and complete Google form

Use the pun to help you identify the element Use the pun to help you identify the element. Give the element’s name and symbol. Superman’s weakness A person who sells furs Thanksgiving guests Mickey’s pal What you do to catch a horse

The answers are … Superman’s weakness A person who sells furs Thanksgiving guests Mickey’s pal What you do to catch a horse Krypton - Kr Sulfur - S Indium - In Plutonium - Pu Europium - Eu

The Periodic Table Think of all the ways a deck of cards could be laid out so that the cards form some sort of identifiable pattern, write as many of the patterns as you can. Dmitri Mendeleev also looked for a pattern among the elements. He looked at their properties, including density, mass, appearance, melting point, etc. He realized there was a pattern when the elements were arranged in order of increasing mass.

Here is a “periodic” table. What is it?

The columns are called “GROUPS” or families. What is represented by the groups on this periodic table? DAYS

The rows are “PERIODS”. WEEKS What information is in the horizontal periods? WEEKS

? ? Certain information is missing. How would you find the missing data? Group 5 ? ? Period 3

Periodic - What does it mean? A regular repeating pattern. What are some examples? Days of the week, the months of the year, the numbers on the clock. The pattern was so strong that Mendeleev realized there were missing elements that had not yet been discovered.

The Periodic Law It states that the chemical and physical properties of elements are periodic or repeating functions of their atomic numbers.

The Periodic Table

Important Facts The columns are called groups or families and have similar chemical and physical properties. The rows are called periods because the properties in a row follow a repeating pattern.(ex. less metallic from left to right) The elements are classified as metals, nonmetals and metalloids. There is a “staircase” on the table that can help you recognize which elements are which.