even though atoms are much to small to see experiments have helped scientist learn about the subatomic particles that compose atoms. the current model of an atom has a nucleus in the center surrounded by an electron cloud which of these parts of the atom has the greatest mass?

Layer r contains a well-known index fossil that is 100 million years old. based on this information and the principle of superposition, a. layers t and m are older than 100 million years, and layers x and g are younger than 100 million years. b. layers t, m, x, and g are all older than 100 million years. c. layers t and m are younger than 100 million years, and layers x and g are older than 100 million years.