The atomic number of an element is always the same as

a. the number of electrons

b. the number of protons

c. the number of neutrons

d. the number of protons plus neutrons

An engineer decides to use a slightly weaker material rather than a stronger material, since she knows that the stronger material can break suddenly. this is an example of what? a choosing a material that will show warning before it fails b using composite materials that combine strength c using a material for multiple applications d using design techniques that increase efficiency and reduce cost