Alithium ion is different than a lithium atom because it a. is much more massive. b. has an extra neutron. c. has a different electric charge. d. is in a different group in the periodic table. select the best answer from the choices provided

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