Which statement best explains how the mass of an atom is organized?

most of the mass is contained in the nucleus.
the mass is spread evenly throughout the whole atom.
the mass is spread evenly throughout the electron cloud.
most of the mass is contained in the electron cloud.

Heena wants to measure the volume of a ball that is 24 cm across. how should she set up her equation?

Order the sequence of ideas that lead to marie curies discovery of radioactive elements number the events in chronological order starting with the oldest

Aspectroscope breaks light up into its colors, allowing scientists to analyze light from the solar system and universe. by studying the spectral line patterns, widths, strengths and positions, scientists can determine the speed, position, and of celestial bodies. a) age b) origin c) rotation d) temperature