The formula of a salt is XCl2. The X ion in this salt has 20 electrons. The metal X is .

Which states of matter have particles that move independently of one another with very little attraction?

8. what happens to matter during a chemical reaction

Which statement best summarizes the importance of ernest rutherford’s gold foil experiment? it proved that all of john dalton’s postulates were true. it verified j. j. thomson’s work on the atomic structure. it showed that an electron circles a nucleus in a fixed-energy orbit. it showed that a nucleus occupies a small part of the whole atom.