The emission of electromagnetic radiation by an excited atom is best explained by

Determine the number o moles of ions/atoms/particle in the following: 2.50 miles of k2s (let me know how to do)

Why does the sun appear to be the brightest star in the sky? a- its apparent brightness is much greater than other stars. b- it burns more gas, making it brighter than any other star. c- it is the largest star in the galaxy, so it is the brightest star. d- its relative distance to earth is closer than the other stars.

Why is carbon ideal for making different compounds?