Which postulate of Dalton’s atomic theory has not been disproved by further investigation? OPTIONS All matter is made of tiny particles called atoms. Atoms are indivisible and indestructible. All atoms of a given element have the same mass. Atoms of an element are all identical. Which statement below best describes the current model of the atom based on the Rutherford’s gold foil experiment? OPTIONS An atom is a solid sphere with positive and negative charges spread throughout. The atom has a neutral nucleus containing protons and neutrons, and electrons orbiting the nucleus. The atom has a small but very dense nucleus containing protons and neutrons. The atom has a dense positive nucleus that allows electrons to pass through it. Dalton noticed that 100 g of tin will combine with 13.5 g or 27 g of oxygen. He also noticed that the ratio of 13.5 to 27 is the same as the ratio of 1 to 2. This observation corresponds to which of the following conclusions?