Answer:
Explanation:
Hello, since the Gibbs' phase rule states the following equation:

Whereas C is the number of components and P the present phases, you answers are:
1. F=1-2+2=1.
2. F=2-2+2=2.
3. F=2-2+2=2.
Best regards.
When identifying an element the most important subatomic particle to look at is the proton because this is the number that the periodic table is organized by...
For example the element
Hydrogen has 1 proton and it is listed as number on the periodic table