Mendeleev was able to predict undiscovered elements.?

Question

True
False

Answer 1

Yes.

It was an excellent demonstration of how science works: Mendeleev ordered the elements according to valence, because this was a property that was well known. From this information he was able to predict elements that were not yet discovered, and when they were discovered, they matched the predictions.

Mendeleev's prediction on eka-aluminium called for an unusually low melting point (30 degrees C). The first samples of gallium didn't match this. Mendeleev stuck to his guns, and when more pure samples of gallium were obtained, they matched the melting point Mendeleev had predicted.

The use of Sanskrit numbers (eka, dva, etc.) seems to be unique in science.

Answer 2

True.
He predicted 3 undiscovered elements and also predicted their properties..

Answer 3

Yes. That's why he could make sense out of the elements and create the periodic chart. He didn't understand why, but he knew it had to be that way.

Answer 4

It is absolutely true. He was able to. He even saw his famous table in a dream and when he woke up in the morning, he simply wrote it down.

Answer 5

So did Walter Russell. He even predicted a few that haven't been discovered yet.

Answer 6

True

Answer 7

ya... he was able to predict te discovery...
he named those predicted element as eka-"the name of a similar element..."

Answer 8

yes . he perdicted technecium element 43 which has only radioactive isotopes

Answer 9

True.

Answer 10

true