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

Physics & Space Science

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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

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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

Physics & Space Science

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.

Physics & Space Science

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

Physics & Space Science