Examlex
The vertical number line is called the __________.
Pure Water
Water that has been purified to remove impurities, consisting only of H2O molecules.
Acidity
A measure of the concentration of hydrogen ions in a solution, indicating how acidic or alkaline the solution is.
Hydrogen Ions
Positively charged ions (H+) that are formed when hydrogen atoms lose their electrons; a high concentration of hydrogen ions indicates acidity.
Protons
Positively charged subatomic particles found in the nucleus of an atom, determining the element's atomic number.
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