Scientists initially believed that the smallest particle of matter was the atom. then, particles smaller than the atom were discovered.

what most likely contributed to the change in this theory?

new definition of theory
new technology
new generation of scientists
new way of thinking

New technology

Explanation:

A scientific theory is the description of the reasons responsible for the cause of a natural event or natural phenomena. It based upon data and evidences obtain after implementation of methodologies.

The new technologies can be useful for improving the methodologies used for proving theories. These technologies can be useful in adding new facts to the theories. Hence, new technology will contribute to the change in the given theory.

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