Estimate the radius (in fm) of a radon nucleus that contains 86 protons and 136 neutrons
What will be an ideal response?
7.3 fm
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According to astronomers, the Milky Way is _____
A) wheel shaped B) hexagonal C) rectangular D) bell shaped
Terrestrials are small, rocky, and dense
a. True b. False Indicate whether the statement is true or false
Why does Titan have such a nitrogen-rich atmosphere?
A) It was formed that way in the solar nebula. B) The nitrogen comes from the breakup of ammonia (NH3 ) by solar radiation and subsequent thermal escape of the hydrogen. C) The nitrogen was formed from the chemical reaction of sulphuric acid with surface rocks. D) Through the impact of nitrogen rich comets during the early solar system. E) The nitrogen was created through a chain of fusion reactions in Titan's core.
In the tropics, the trade winds drive equatorial ocean currents
A) eastward. B) westward. C) southward. D) northward.