Question 1 unsaved an atom of an element with atomic number 48 and mass number 120 contains question 1 options: 72 protons, 72 electrons, and 48 neutrons. 72 protons, 48 electrons, and 48 neutrons. 120 protons, 48 electrons, and 72 neutrons. 48 protons, 48 electrons, and 72 neutrons.

Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)