Suppose the innermost orbit an electron can occupy has an energy level of -19 eV. Based on the absorption spectrum shown below, what is the energy of energy level 4? A. -2 eV
B. -8 eV
C. -11 eV
D. -13 eV

If 1.63 times 10 negative 4 of helium dissolves in 100.0g of water, what is the concentration in parts per million

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons