Which statement best explains why the atomic theory developed efficiently? scientists ignored all previous knowledge about atoms. scientists had used creativity in their investigations. scientists had only used standard methods of investigation. scientists repeated experiments to make sure the results were correct.

Scientists had used creativity in their investigations is the statement best explains why the atomic theory developed efficiently.

Option B is the correct choice for the given question.

Explanation:

The basic purpose of experimentation and research is to get conclusions as a solid base for development of theories in science which can help humanity in many other factors.

By utilizing these theories many other experiments and development can be done.  Similarly while postulating the atomic theory scientist had to experiment and research many times and had to do things creatively to get to this important theory.

it's c. elements are placed in rows based on how may valencies electrons have.