Question

the development of atomic theory in the industrial age by scientists such as john dalton and dmitri mendeleyev led to
a. new developments in chemistry
b. new theories about the age of earth
c. a revolution in communications
d. increased life expectancy

Explanation:

John Dalton developed modern atomic theory, and Dmitri Mendeleev created the periodic table of elements, both of which are foundational advancements in the field of chemistry during the Industrial Age. The other options are unrelated to their work: theories about Earth's age fall under geology/earth science, communications revolutions are tied to engineering/tech, and increased life expectancy links to public health/medicine.

Answer:

A. new developments in chemistry