The balls in a modeling kit representing different elements are often distinguished by color. However, there are other ways to identify the elements. Beyond color, what differences do you expect between the atoms of distinct elements in a modeling kit? Select one or more:
a. The arrangement of holes in the atoms
b. The material that makes up the atoms
c. The comparative size of the atoms
d. The number of holes in the atoms

Liquid ammonia is produced at high temperatures and under great pressure in a tank by passing a mixture of nitrogen gas and hydrogen gas over an iron catalyst. the reaction is represented by the following equation. n2(g) + 3h2(g) → 2nh3(g) changing all but one experimental condition will affect the amount of ammonia produced. that condition is a) increasing the concentration of both reactants b) changing the temperature within the tank c) decreasing the pressure within the tank. d) increasing only the amount of nitrogen present.