The symbol for aluminum is Al. Sodium chloride from the given list is a mixture as it consists of two elements. Aluminum tarnishes in air due to its reaction with oxygen.
The symbol for aluminum is Al.
An example of a mixture from the given list is sodium chloride (NaCl), which is a compound containing two elements.
Aluminum tarnishes in air due to its reaction with oxygen, forming aluminum oxide on its surface.
https://brainly.com/question/41647848