Why does an atom have a neutral charge? Milli O A. It has equal numbers of electrons and protons. O B. The number of neutrons equals the number of protons and electrons in the atom. O c. It has equal numbers of neutrons and protons. O D. It has equal numbers of electrons and neutrons.​

If a 60-g object has a volume of 30 cm3, what is its density? 2 g/cm3 0.5 cm3/g 1800 g * cm3 none of the above

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)

What must be in balance for temperatures to remain constant?