Which of the following is a valid set of four quantum numbers? (n, l, ml, ms) A. n = 2, l = 1, ml = 0, ms = +1/2 B. n = 2, l = 2, ml = +1, ms = -1/2 C. n = 1, l = 0, ml = +1, ms = +1/2 D. n = 1, l = 1, ml = 0, ms = -1/2 E. n = 2, l = 1, ml = +2, ms = +1/2

gas and liquid

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west