Final answer:
Dmitri Mendeleev is the creator of the first Periodic Table, which he published in 1869, accurately predicting undiscovered elements.
Step-by-step explanation:
The hirsute progenitor of the Periodic Table is Dmitri Mendeleev. In 1869, the great Russian chemist Dmitri Mendeleev published the first periodic table of the elements, which organized the elements based on their atomic mass and introduced the periodicity in their properties. Mendeleev's periodic table had the insight to leave gaps for elements that had not yet been discovered, predicting their existence and properties. His predictions were confirmed with the later discovery of elements like gallium and germanium, which matched the properties he predicted.