Leg crams are symptoms of lack of potassium
They have the same extensive properties because the sample contains the same amount of matter. They do not have the same intensive properties because they do not have the same composition or type of matter.
Answer:

Explanation:
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In this case, since the radioactive reaction for the alpha emission of astatine-218 to bismith-214 involve the release of a helium atom as shown below:

Whereas the atomic number decreases by 2 and the mass number by 4 in agreement to the release of the Helium atom.
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True... atoms contain what are called electrons and protons. the protons being possitively charged and the elctrons being negatively charged
Dont know the first part but melanin quantities change the dkin color