30 POINTS ANSWER QUICKLY Defend J. J. Thomson's work on the atom and its contribution to the modern atomic model. Point out which contributions are present in the modern atomic model and which were eventually disproven and thus are not part of the modern model.

In saturated organic compounds, all the bonds between carbon atoms are called?

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.

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)