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mendelev's table of evidence is showing that the metals and the elements showing in the Periodic Table is all about the equal amount of protons,electrons,and neutrons showing in the periodic table about the Atomic Mass and number is by the mass equals the protons and neutrons in the nucleus.
example: Helium: symbol:He
atomic number:2
atomic mass muber:4
protons:2
electrons:2
neutrons:2
how do you get 2 for the neutrons???
you subtract 2 from the atomic number and for the mas number you subtract 4
so 4-2=2 and then so the protons and electrons stay the same for the atomic number because protons and electrons they are both equal.
Wiki User
∙ 14y ago
Y. J.
Wiki User
∙ 14y agoThe usefulness was confirmed by the fact that elements having similar properties fitted in the same row,and the properties like radius etc increased gradually from left to right.Using it new elements could also be guessed.
Wiki User
∙ 14y agoIt correctly predicted properties of elements that were not yet know at the time, like eka-silicon, which eventually became known as germanium.
Wiki User
∙ 6y agoGallium
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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.
What did Mendeleevs periodic table look like?
It looks the same as it did when Mendeleev created it. There are no changes made to the table throughout the years because Mendeleev had predicted the correct placement for all of our current known elements.
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.
How was mendeleevs periodic table like todays periodic table?
it has elements
Why the improvement in Mendeleevs periodic table was made?
To understand the concept of Periodic Table
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......
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
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
What is supporting evidence of the whldam resort?
what are supporting evidence of the whyldam resort?
Was Mendeleevs table a completely regular grid?
not if u mean completely filled in but square by square yes
Main idea of mendeleevs first periodic table?
In Mendeleev's periodic table, the elements were arranged in the increasing order of their atomic masses and repeating periodic properties.
What were mendeleevs discoveries and predictions and discoveries abot the periodic table?
Mendeleev predicted that properties of elements are periodic function of atomic mass. He demonstrated it by creating a table.
