Why are significant figures important when taking data in the laboratory? why aren’t they important in math class?

Describe the particles of all three phases of matter in the root beer float. (how are the particles arranged and moving? )

1) these are barrel shaped microtubules in most animal cells, that organize the spindles during cell division

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.