The answer in chemistry is mol/L and altho it is represented by the symbol M usually.
Electrically neutral objects can become charged when they gain or lose electric charges. When an object is electrically neutral then the overall charge of the object is Zero. If a neutral object gains negative charges then it will become negatively charged, and if it looses the negative charges (electrons) then it becomes positively charged.
Volcano experiment
Volcano lavatory
Volcano extravaganza
Volcano blow thrash
Concrete is formed of sand. Is it incorrect to suggest that some houses are built using concrete blocks?