Presentation on theme: "The Periodic Table 6.5A Students will know that an element is a pure substance represented by chemical symbols."— Presentation transcript:
1 The Periodic Table6.5AStudents will know that an element is a pure substance represented by chemical symbols.
2 The BasicsThe periodic table is a chart that is used to organize the elements.Everything on Earth is made up of these 111 elements.Elements are pure substances that cannot be broken down into simpler substances by ordinary means.
3 Matter All matter on Earth is made up of elements. You might think of them as building blocks that can be put together in different ways to make up everything on Earth.Legoland
4 SymbolsOn the periodic table, each element is listed with its chemical symbol and atomic number; many versions of the table also list the element's atomic mass.Use the key like the one shown below.
5 Chemical SymbolsAll elements are shown with one or two letter symbols.The first letter is always a capital letter. The other letter is always lower case.This is important so readers know CO is a combination of Carbon and Oxygen while Co is the element Cobalt.
6 Arrangement of Elements Elements are listed in order of increasing atomic number.The atomic numbers get bigger on the chart from left to right going across in rows.Elements with properties in common are grouped together
7 GroupsThe elements on the periodic table are arranged so that elements with similar properties fall into the same vertical column.These vertical columns are called groups or families.Some groups have names such as theNoble gases shown here.
8 PeriodsA period is a horizontal row in the periodic table of the elements
9 Metals, Metalloids and Nonmetals Metals and Nonmetals are separated with a stair-step lineMetals are to the left of the line and nonmetals are to the right.Elements on the line are metalloids.We will learn more about the properties of these groups later.
19 Why use the Periodic Table? The main value of the periodic table is the ability to predict the chemical properties of an element based on its location on the table.Elements can be located quickly and are displayed in an easy to read format
20 Now, you have all the information you need ready on your periodic table.