If the atomic mass of an Atom is 18 how many neutrons are in the nucleus

6/12=1/2

step-by-step explanation:

the answer would be a

seeing the graph would

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