Mendeleev's predicted elements
Elements predicted but not found in 1869
Mendeleev's predicted elements
Dmitri Mendeleev published a periodic table of the chemical elements in 1869 based on properties that appeared with some regularity as he laid out the elements from lightest to heaviest. When Mendeleev proposed his periodic table, he noted gaps in the table and predicted that then-unknown elements existed with properties appropriate to fill those gaps. He named them eka-boron, eka-aluminium, eka-silicon, and eka-manganese, with respective atomic masses of 44, 68, 72, and 100.
Read on Wikipedia · Image User:Double sharp, based on File:Simple Periodic Table Chart-en.svg by User:Offnfopt, CC BY-SA 4.0
Open boosters, collect cards and trade them. Free to play.
Play for free