Which electron configuration represents the electrons in an atom of calcium in an excited state?
A)2-8-8
B)2-8-8-2
C)2-7-8-1
D)2-7-8-3

Answer is to avoid experimental error

Ibelieve the answer is d

Sun is explosive itself spread 9 planets.earth is 3rd explosive in the solar system about 500 hundred million years ago . first earth became ice age and freezing climate.centre of earth magma. north zone is artic . south is anatric