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The story goes.... In the search for the relationship between the known elements, Dmetri Mendeleev's devised a card game made of elements; sort of like 'elemental solitaire'. In this game, each card had one element written on it with its atomic weight. He spent 2 sleepless days attempting to find a relationship by grouping the cards together on the table. On the third day there was a snow storm and Mendeleev's decided to stay home. Although restless he eventually fell asleep in which he dreamed a scientific breakthrough. In this dream he saw the elements arranged in a table and they were grouped together by various properties. When he awoke, he attempted to group the known elements in this manner and noticed that in order for this arrangement to work, he needed to leave spaces or gaps for other elements. Therefore, he also discovered that there were many other elements needed to be discovered.
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Why did scientists try to improve Mendeleevs table?
because they did not feel that his table was well enough to be used world wide.
Mendeleevs periodic table of elements was created in 1901?
Mendeleev's periodic table of elements certainly wasn't created in 1901
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.
How could you use Mendeleevs periodic table to identitify new elements?
He left gaps for the new elements. The properties could be estimated from the space left by him.
What makes up the halogen triad?
This refers to an old "history of science " topic around the work done prior to mendeleevs on Periodic Table. Elements were put in triads with similar properties. The halogen triad was chlorine, bromine and iodine. Pretty useless idea long term but a good start for people who came later.
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......
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
Which kind of properties fell into families or groups in Mendeleevs system of elements?
Non-metals and Metalloids
Which matches Mendeleevs prediction for the properties of eka-aluminum?
It would be a soft metal with a low melting point.
Was Mendeleevs table a completely regular grid?
not if u mean completely filled in but square by square yes
Why did scientists try to improve Mendeleevs table?
because they did not feel that his table was well enough to be used world wide.
Why the improvement in Mendeleevs periodic table was made?
To understand the concept of Periodic Table
