In what year was the first periodic table published

1869

Explanation:

A look at the first published periodic table. In 1869 Dmitri Mendeleev developed his system of the elements to solve a pedagogical problem.

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.