In the nineteenth century, what was known about atoms?

Atom is the smallest unit of matter which determine the chemical and physical characteristics of an element

Explanation:

During the 19th century the following was known about an atom

a)An element consists of only one type of atom.

b)Atoms cannot be created nor they can be destroyed.

c)Atom of one element differs from atom of other element

d)Atom is the smallest unit of matter

e)Two or more atoms form a compound.

f)      The chemical and physical characteristics of an element is determined by  the characteristics of its atom

i think the answer is g1

hope i

-lavira: )