Three electrons passed from the first uncharged drop to the second. Which drop became negatively charged – the first or the second?

Since the electrons passed from the first drop to the second, there were more of them on the second, and the second drop became negatively charged, and the first drop positively charged.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.