The element radium is found in period 7 and group 2 of the periodic table of the elements, and it has an atomic number of 88. how many s orbitals are used in an atom of radium?
44
88
7
2

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.

What royal scientist used the 29th day of frozen vapor to encounter elements for mastering new culinary creations?

Calculate the energy required to ionize a hydrogen atom to an excited state where the electron is initially in the n = 5 energy level. report your answer in kilojoules