space.template.3.Lab9AlkaliMetals

=Alkali Metals=

In our last class we learned that the elements on the periodic table were arranged in vertical columns called groups or families. These groups have similar properties. One of these properties is combining capacity or the amount of electrons that they have in their outer electron shell. The amount of electrons that an element has in it's outer shell dictates how likely that element is to form bonds with other elements.

In this lab investigation, we are going to examine some of the properties of the Alkali Metals, which are located in group 1. These metals are typically not found in nature due to their highly reactive nature. Only having one electron in their outer orbital, these elements are very likely to combine with other elements to complete their outer electron shell. Most elements like to have eight electrons in their outer shell, except for hydrogen and helium, which only require two. Aside from their high reactivity, some of the other characteristic properties of Alkali metals are that they are often silver colored and have a shiny luster. They are soft and can easily be cut with a knife, due to their low density.

//Lab Safety: Due to the highly reactive nature of sodium, this lab will be performed as a demonstration. During part of the lab you will be required to stand toward the back of the room. Failure to comply with safety precautions will cause immediate removal from the classroom and disciplinary action.//

1.) What are the vertical columns in the periodic table called? 2.) What is meant by combining capacity? 3.) What group are the Alkali metals located in? 4.) What is one property of Alkali metals? 5.) Predict: What will happen when pure sodium combines with water?
 * Prelab**

Describe the steps and safety precautions that we take during this demonstration
 * Procedure**

Describe the reaction that occured.
 * Data**

1.) Based on your observations, what type of reaction do you think potassium might have with water? 2.) Why did the sodium reacted as quickly as it did with the water? 3.) What was the gas that was escaping when the sodium reacted with the water? 4.) What product did the pure sodium form? 5.) Why is pure sodium rarely found in nature?
 * Analysis**

Was your hypothesis correct? Suggest a research question that you might like to investigate further.
 * Conclusion**