Song in place in the mentally period of periodic table in some of this place the atomic mass has been to be the predicted in allies three of the spirit predicted atomic masses along with their group and period
Answers
Answered by
0
Answer:
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.[1] 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.
Similar questions