Soledad studied rocks and how they help show the history of Earth. She knew that scientists use different ways to find out how old rocks layers are and recognized one such example in the rock in the imagine. The image is an example of a/an _ rock.

The rules of engagement (roe) working group is often used to (select all that apply.)

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.

Using the periodic table, complete the following. element: hydrogen symbol: h₂ molecular weight: g mass of one mole: g/mol