Concentration involves the relative amounts of solvent and solute in a solution, when strength is related to the extent to which a substance dissociates :))
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Positive charge=proton
Negative charge=electron
No charge/neutral=neutron
Answer: gases
Explanation: because gases move around freely and they would be the only one to make sense because solid are compacted together and liquid are not so fast at moving but gases are wild
dont use this this is a bad explanation
It's probably because there is no gravity which ballpoint pens need for inkflow to the tip.