1 ESMOND: Variant spelling of Middle English Estmond, meaning gracious protector.. 2  ESMUND: Variant spelling of Middle English Esmond, meaning gracious protector.. 3  ESTMOND: Variant spelling of Middle English Estmund, meaning gracious protector..
Mendeleev was the inventor of the periodic table. He organized all the known elements into the periodic table based on atomic number. He was also able to predict the existence â¦ of elements that had not yet been discovered based on gaps in the table he created.
There were 60 known elements in 1860 when Mendeleev published his Periodic Table. The Periodic Table of Elements. CIENTISTS HAD IDENTIFIED over 60 elements by Mendeleev's time. (Today over 110 elements are known.) In Mendeleev's day the atom was considered the most basic particle of matter..He left gaps gaps in the table when it seemed that the corresponding element had not yet been discovered. (Mendeleev was not the first chemist to do this, but he was the first to be recognized as using the trends in his periodic table to predict the properties missing elements),