Presentation on theme: "The Periodic Table 6.5A Students will know that an element is a pure substance represented by chemical symbols."— Presentation transcript:
The Periodic Table 6.5A Students will know that an element is a pure substance represented by chemical symbols.
The Basics The 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.
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
Symbols On 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.
Chemical Symbols All 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.
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
Groups The 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 the Noble gases shown here.
Periods A period is a horizontal row in the periodic table of the elementsperiod
Metals, Metalloids and Nonmetals Metals and Nonmetals are separated with a stair-step line Metals 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.
Metals, Metalloids, & Nonmetals
Notice that Aluminum (Al) touches the line but is a metal. Hydrogen (H) is on the other side and is a nonmetal.
On Your Copy of the Periodic Table… Draw and label arrows for : Periods Groups
Metals, Metalloids, and Nonmetals You know that Oxygen is a gas and IS NOT a metal. Find it and circle it. Above this section, write NONMETALS.
Metalloids and Exceptions Now, trace the stair-step line and write in metalloids. Remember Aluminum and Hydrogen are exceptions. Mark them with a light X.
Metals Find Gold (Au). You know that it is a metal. Circle it and write METALS in the section above it.
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
Now, you have all the information you need ready on your periodic table.