It's known as the first state because it was the first state to enter the USA.
Delaware.
New South Wales is the "First State".
Delaware is known as the "First State"
New York is known for the first 3D movie
First name the city-state.
New South Wales is often referred to as the "First State". It was previously known as the Premier State.
It was the first state to ratify the constitution.
December 7, 1787 was when Delaware became the first state to ratify the Constitution of the United States, thereby becoming known as the first state of the United States.
Rykers island``
Connecticut is known as "The Consitution State" because it was the first of the original thirteen states to ratify the new US Constitution.
Mercury exist in pure state in the nature and is known from thousands of years.