On 17 February 1869, Russian chemist Dmitri Mendeleev jotted down the symbols for the chemical elements, putting them in order according to their atomic weights and inventing the periodic table.

Welcome to the mnemonicsAi, the Mnemonic generator. A mnemonic device is a sentence that helps us to memorize a string of words. For example, math students use "Please Excuse My Dear Aunt Sally" to ...

The modern periodic table, arranged in rows and columns, was first introduced by Dmitri Mendeleev in 1869. At the time, it included the known elements and their properties, but Mendeleev predicted ...

There are three different types of plague: bubonic, pneumonic and septicaemic ."If left untreated, the bubonic form has a 30 percent to 60 percent fatality rate and the pneumonic form is almost ...