You can determine an element based on its protons due to the atomic number.
Atomic number is the number of protons in an atom and you can locate it on your periodic table as the number above the letter. Each element has a different number of protons and because of that you can find the element on the periodic table based on its atomic number.
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C-Sulfurous acid. Other Chemical Names: Sulfurous acid; 7782-99-2; Sulphurous acid; Sulfur dioxide solution
Yes, you can. the more water ( a common solvent) you add to a solution, the more dilute it gets.
example, you have a cup of black coffee and it is very strong and bold. you can dilute this coffee by adding more water. it will test less bold, so less concentrated.