Group the electronic configurations of neutral elements in sets according to those you would expect to show similar chemical properties. a. 1s^22s^2 2p^3

b. 1s^2 2S^2p^6 3s^2 3p^3

c. 1s^2 2S^2 2p^5 3s^2 3p^5 3d^10 4s^2 4p^5

d. 1s^2 2s^2 2p^5 3s^2 3p^6

Set A Set B

Write the empirical chemical formula of calcium with a mass percent of 38.8, phosphorus with a mass percent of 20.0, and oxygen with a mass percent of 41.3.

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

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