___% of the Moon’s surface is always illuminated by the Sun except during a

50%

Explanation:

Half of the Moon's surface is always illuminated by direct sunlight, except during lunar eclipses when Earth casts its shadow on the Moon. Just how much of that light we can see from Earth varies every day, and we refer to this as a Moon phase.

the electron configuration that you gave me has 16 electrons ergo it has 16 protons ergo it is the element sulfur.