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Professor Dmitri Mendeleev published the first Periodic Table of chemical elements in 1869 based on properties which appeared with regularity. He noted gaps in the table, and predicted that as-of-yet unknown elements existed with properties appropriate to fill those gaps.
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Mendeleevs periodic table was useful because it enabled scientists to predict properties of unknown?
elements
Which kind of properties fell into families or groups in Mendeleevs system of elements?
Non-metals and Metalloids
Used by scientists to make a prediction?
hypothesis
Nostradomus prediction of when the world will end?
2012
Why will earth end on 21st of December in 2012?
The end of the Earth has been predicted many times in the past. This particular prediction originated from the Mayan's who were a member of an American Indian people of Yucatan and Belize and Guatemala. there is absolutely no reason why this prediction should come true, any more than any other false prediction of the past.
Which matches Mendeleevs prediction for the properties of eka-aluminum?
It would be a soft metal with a low melting point.
How could Mendeleevs table be used to predict the properties of elements that had not been discovered?
Comparing the properties of the new element with the properties of the other elements in the group we can make this prediction.
What effect did the discovery of the gallium have on the acceptance of Mendeleev's table?
The close match between Mendeleevs prediction and the actual properties of new elements showed how usefullhis pariodic tabel could be.
What effects did the discovery of gallium have on the acceptance of Mendeleev's tables?
The close match between Mendeleevs prediction and the actual properties of new elements showed how usefullhis pariodic tabel could be.
What was the problem with mendeleevs arrangement?
He pooped quite a bit
How was mendeleevs periodic table like todays periodic table?
it has elements
Did Mendeleevs group his elements with those of similar properties?
Yes, this affirmation is true.
What value was there in predicting the properties for gaps in Mendeleevs table?
DiscoVery of new elements
What was the problem with Mendeleevs table?
He left too many spaces between the elements......
When you anticipate the results of your experiment before you begin you are making an?
prediction. :)
What changes were made to the periodic table after Dmitri mendeleevs discovery?
they changed the 3 new Elements.
Mendeleevs periodic table was useful because it enabled scientists to predict properties of unknown?
elements
