Dimitri Mendeleyev is credited with organizing the elements into the first periodic table

In 1889 a Russian chemistry teacher created an organized table of the elements. At the time only 63 different elements were known. Below is a reproduction of that table.

• In 1889 a Russian chemistry teacher created an organized table of the elements. At the time only 63 different elements were known. Below is a reproduction of that table.

• What do you think the numbers represent?

How did Mendeleyev organize the elements?

• How did Mendeleyev organize the elements?

Explain how the periodic table of elements is organized.

• Explain how the periodic table of elements is organized.

Dimitri Mendeleyev is credited with organizing the elements into the first periodic table.

• Dimitri Mendeleyev is credited with organizing the elements into the first periodic table.
• The main properties that Mendeleyev used to sort the elements were reactivity with one another and a number describing the atomic weight of each element.

Purpose: The goal of this lesson is to acquaint you with Mendeleyev’s organization of the elements by allowing you to create your own table from the patterns you see in the elements.

• Purpose: The goal of this lesson is to acquaint you with Mendeleyev’s organization of the elements by allowing you to create your own table from the patterns you see in the elements.

Below are five possible cards for the element germanium. Where does germanium belong in the table? Which card seems most accurate to you? What is your reasoning?

• Below are five possible cards for the element germanium. Where does germanium belong in the table? Which card seems most accurate to you? What is your reasoning?

What would you add to the three empty corners to complete the card?

• What would you add to the three empty corners to complete the card?

Completed Table

• Completed Table

Which of the following elements would you find in the same group on the periodic table? Explain your thinking.

• Which of the following elements would you find in the same group on the periodic table? Explain your thinking.

Mendeleyev organized the periodic table based on the properties of the elements.

• Mendeleyev organized the periodic table based on the properties of the elements.
• Mendeleyev’s arrangement of the elements helped to predict the existence of undiscovered elements.

Where did Mendeleyev place copper, Cu, on the periodic table he created? (Note: The atomic weight of copper is 63.)

• Where did Mendeleyev place copper, Cu, on the periodic table he created? (Note: The atomic weight of copper is 63.)
• Where would you put copper, Cu, on your periodic table? Explain your thinking.

How can you predict properties of elements using a periodic table?

• How can you predict properties of elements using a periodic table?

Interpret some of the information given in the periodic table.

• Interpret some of the information given in the periodic table.

The elements in the middle of the table are referred to as the transition elements, or the transition metals.

• The elements in the middle of the table are referred to as the transition elements, or the transition metals.

Purpose: This lesson will help to identify many of the patterns that are contained in the periodic table of the elements.

• Purpose: This lesson will help to identify many of the patterns that are contained in the periodic table of the elements.

The elements copper and gold are both relatively unreactive. It is easy to bend and shape both metals. Both are used to make coins and jewelry. Is the similarity in their properties consistent with their locations on the periodic table? Explain why or why not.

• The elements copper and gold are both relatively unreactive. It is easy to bend and shape both metals. Both are used to make coins and jewelry. Is the similarity in their properties consistent with their locations on the periodic table? Explain why or why not.

Use the cards for Cu, copper, and Au, gold, to describe all you can about the element silver, Ag

• Use the cards for Cu, copper, and Au, gold, to describe all you can about the element silver, Ag

Elements in each column of the periodic table have similar properties.

• Elements in each column of the periodic table have similar properties.
• We can predict the characteristics of a missing element based on the qualities of the elements found adjacent to it in a periodic table.