Alexandra knows that the atomic number of the element potassium, k, is 19. she also knows that one particular isotope of potassium has a mass number of 39. how many neutrons can be found in the nucleus of this isotope of potassium?

a) 19

b) 20

c) 39

d) 58

Pl asaaap ! match the term to the correct description. a type of wave that transfers energy where the particles in the medium move perpendicular to the direction in which the energy is traveling. a type of wave that transfers energy where the particles in the medium move parallel to the direction in which the energy is traveling. movement that is back and forth, like an equal sign = a type of wave that transfers energy where the particles in the medium move in a circle motion while the energy travels left or right. movement that is like a t transfers energy from one location to another 1. wave 2. parallel movement 3. perpendicular movement 4. transverse wave 5. longitudinal wave 6. surface wave