Correct Answer: The Sun heats the Earth unevenly; this heating pattern then causes convection currents in the atmosphere.
Neil Bohr contributed towards science in many ways, but his contributions did not include the charge of an electron. Neil Bohr recognized a relationship between the chemical properties of a substance and the number of valence shell electrons. Moreover, he introduced the atomic model in 1913 and provided the liquid-drop model to explain nuclear fusion.
The symbol for the hydroxide ion is OH-
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