Benjamin Franklin was the first person who discovery that lightning. He was study charged particles.
The first inverentory he study kite and key to make a thunderstorm to make a lighting strike.
He was inverentory that went more experiment
They need to have whole cloud fill up with electrical charges. Then lightning have a positively charged particle from at the top of the cloud.
If you have a negatively charged particles sink to the bottom of the cloud.
Lightning is caused by an electrical charge in the atmosphere that is unbalanced.
It move to of the air and ice inside a thundercloud creates an electrical charge, with the negative charge have electrons, positive charge protons forming at to the top.