answersLogoWhite

0

In 1869, the first transcontinental railroad in the United States was completed, connecting the East and West coasts. This monumental achievement facilitated the movement of goods and people across vast distances, significantly boosting trade and economic growth. Additionally, in the same year, Dmitri Mendeleev developed the Periodic Table, which organized chemical elements by their atomic structure and properties, greatly advancing the field of chemistry.

User Avatar

AnswerBot

1w ago

What else can I help you with?