4 elements

14 elements were known

wrote the first extensive list of 33 elements

He found three other groups with similarities. He called these groups

(German Chemist) noticed that Br, Cl, and I had similar properties and that Br's atomic mass was between that of Cl & I.

He found three other groups with similarities. He called these groups triads

He also noticed that every 8th element had similar chemica and physical properties. Their properties were repeating. This became known as _

English Chemist) arranged the now known 62 elements from lightest to heaviest.

He also noticed that every 8th element had similar chemica and physical properties. Their properties were repeating. This became known as Newland's Law of Octaves.

spiral on a cylinder by order of increasing atomic weight

First person to notice the periodicity of the elements

Considered the Father of the Modern Period Table!

Russian Chemist) organized the elements by atomic mass also but made it into table form to help his students.

This gave rise to the Periodic Law, "Properties of elements are periodic functions of their atomic mass."

At the same time, he published his own table of the elements organized by increasing atomic mass.

English Chemist) arranged elements by atomic number.

Only living person for whom an element was named.

Discovered 8 new elements

aranged elements by atomic number

Arangged the elements to lightest to heaviest

Arangged elements by atomic mass