Final answer:
De Chancourtois was not highly praised because his publication was not widely accessible and his helical presentation of the periodic system was complex, unlike Mendeleev's and Meyer's more understandable tables based on atomic mass.
Step-by-step explanation:
De Chancourtois was not given much praise for his work on the periodic table due to two main reasons. First, his work was not widely disseminated or understood at the time because his publication was mainly in French and not accessible to many scientists. Secondly, his presentation of the periodic system in the form of a helix was quite complex, which made it difficult for others to understand or adopt his ideas. In contrast, Dmitri Mendeleev, who published his periodic table in 1869, and Lothar Meyer were credited for their development of the periodic table due to their use of atomic mass to arrange elements, and Mendeleev's foresight in predicting undiscovered elements.