Chlorine has a charge -1. It means that X is +2 so that the formula is XCl2. Group 2 is the correct answer.
Answer:
There are 146 neutrons in Uranium-238
There are 90 electrons in Thorium-234
The answer to this is B, solids with a repeating atomic pattern.
Alfred Wagner's evidence began at the simplest form that the continents appeared to<em> fit</em> together like pieces to a puzzle. It wasn't only that though. The evidence showed that the same rocks and fossils existed on separate continents - the same continents that if pieced together would be connected.
Well since i need points I am going to say read the text
