Which of the following is the electron configuration of an electrically neutral atom of argon (ar)? (a) 1s² 2s² 2p5 (b) 1s² 3d¹⁰ 4f⁷ (c) 1s² 2s² 2p⁶ 3s² 3s⁶ (d) 1s² 2s1

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