Инструкция к уроку "Щелочные металлы"

Lesson instruction “Alkali metals”

1. Study the module “General characteristics of the elements belonging to the main subgroups of Periodic table’s I and II groups” (frame 1) and answer the following questions:

Which elements can be classified as alkali metals?

Define the position of alkali metals in the Periodic table.

1. Study the information given in the textbook and the module “General characteristics of the elements belonging to the main subgroups of Periodic table’s I and II groups” (frame 3) and answer the following questions:

What are the specifics of the electronic structure of alkali metals?

What characteristics do alkali metals display when undergoing a chemical reaction?

Indicate the oxidation level typical for such metals

1. Study the information given in the textbook and the module “General characteristics of the elements belonging to the main subgroups of Periodic table’s I and II groups” (frame 3) and answer the following questions:

What are the alkali metals?

Analyze the information about density and melting temperature.

How do the density and the melting temperature change as the relative atom mass increases?

1. What are the specific features of alkali metals interact with oxygen? Compose the equations of reactions sodium, lithium and caesium with oxygen.

2. Observe the interaction of alkali metals with water. What substances do you get as reaction products? How does the chemical activity of alkali metals change from lithium to caesium? Compose an equation of any alkali metal interacting with water.

3. Compose the equations of reactions illustrating the schemes (ex. 1 § “Alkali metals”)

4. Study the information given in the textbook about oxides and hydroxides of alkali metals. Describe their physical properties.

5. Study the samples of sodium’s natural compounds. Put down the results of your observation into the table given below.

Find the formulas of the main components in the reference book. Identify the primary occurrences by using a geographical atlas and additional literature.

1. Study the information given about the salts of alkaline metals. Present the result as a table.