109
106
cause
No natural satellites of Venus have been discovered.
Electrons.
As of September 2021, over 1 million asteroids have been discovered in our solar system. However, it is estimated that there are millions more that have not yet been detected.
how many Mayan codices have been discovered
In 1870, 63 elements had been discovered.
The ruins of seven cities have been discovered in Delhi.
i have no idea when it was discovered
No-one knows, they haven't been discovered
106
he discovered electrons
Positive charge particles are called Protons Negatively charged particles are called Electrons Neutrons have no charge Protons was discovered by Ruther Ford Electrons was discovered by JJ Thompson Neutons was discovered by James Chadwick
up to 120 elements 14 can be the maximum no. of valence electrons if any element with atomic no.greater than 120 is discovered its maximum no. of valence electrons would be 18
10 million
230
lots.