2. among the alkali metals the tendency to react with other substances?
A. Does not vary among the members of the group
B. Increases from top to bottom within the group
C. Varies in an unpredictable way within the group
D. Decreases from top to bottom within the group
Unit 3 lesson 8
1. C
2. B
3. D
4. A
5. B
6. D
7. B
8. D
9. D
10. Periodic law
To determine the tendency of alkali metals to react with other substances, we need to examine their position within the periodic table. Alkali metals are located in Group 1 of the periodic table, which includes elements such as lithium, sodium, potassium, and so on.
The correct answer to the question is B. Increases from top to bottom within the group.
As we move down the group, the tendency of alkali metals to react with other substances increases. This is because the outermost electron in alkali metals is located in a higher energy level (noble gas configuration) as we move down the group. Therefore, this outer electron is more easily lost, resulting in increased reactivity.
Looking at the periodic table and understanding the general trends within a group is key to answering this question correctly.