Complete the complete the following addition and subtraction problems in scientific notation. a. (6.23 x 10KL) + (5.34 x 10KL)

(4.68 x 10^-5cg)+(3.5 x 10^-6cg)

(3.57 x 10^2 mL)-(1.43 x 10^2 mL)

(9.87 x 10^4 g)-(6.2x10^3 g)

Four statements about the development of the atomic model are shown below. a: electrons have wavelike properties. b: atoms have small, negatively charged particles. c. the center of an atom is a small, dense nucleus. d: atoms are hard, indivisible spheres. which order of statements represents the historical development of the atomic model? c-d-a-b c-d-b-a d— в-а — с d-b-c-a