The law of conservation of charge was established in the 18th century. The electron, a carrier of negative electric charge, was discovered at the end of the 19th century, and the proton, which has a positive charge of equal magnitude, was discovered at the beginning of the 20th century.
Which official languages do they speak in Switzerland? Switzerland's four official languages, traditionally spoken in different regions of the country, are German, French, Italian and Rumantsch [sometimes also transcribed as Romansh, Romansch Rhaeto-Romanic or even Romance etc.]).
There are about 8 million people in Switzerland. About 64% of the people speak German as their first language, in northern and central Switzerland. 19% of the people speak French as their first language, in the west of Switzerland. 8% of the people speak Italian, in the south of Switzerland.