What is the radius of the ground state of He+?
A. 0.0529 nm
B. 0.193 nm
C. 0.0265 nm
D. 0.106 nm
E. 0.212 nm
C. 0.0265 nm
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A _____ is a group of stars that formed together and orbit a common center of mass
A) stellar association B) star cluster C) T Tauri star D) brown dwarf
As a blackbody becomes hotter it will radiate ____
a. less energy, at a longer wavelength of maximum intensity b. less energy, at a shorter wavelength of maximum intensity c. more energy, at a longer wavelength of maximum intensity d. more energy, at a shorter wavelength of maximum intensity e. more energy, at a constant wavelength of maximum intensity
We know the Sun is primarily made from hydrogen and helium on the basis of its
A) luminosity. B) spectrum. C) age. D) color. E) mass.
In radioactive decay, the original nucleus before decay is referred to as the
A) daughter isotope B) parent isotope C) mother-in-law isotope D) progenitor isotope