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What was Mendeleev's contribution to the knowledge of elements?
Wiki User
∙ 15y ago
When making his Periodic Table Mendeleev noticed some spaces where elements should be couldn't be filled. He didn't want to force elements that didn't belong there to go there, so he believed the spaces were undiscovered elements. He left the names blank but predicted their properties. Later the elements Mendeleev predicted existed were discovered.
Wiki User
∙ 12y ago
Wiki User
∙ 15y agoHe organized the elements into the Periodic Table and extrapolated the existence of several elements that had not been discovered yet.
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What was Dimitri Mendeleïevs contribution to chemistry?
The organization of the elements (metals, non-metals, and semi-metals) which is known as the Periodic Table Of Elements.
How does science empower?
Science is the pursuit of knowledge. Having a lot of knowledge and education can help people to do more in their lives, thus empowering them. They could make big discoveries that make a major contribution to society.
What are the importance of studying food science?
To have proper knowledge about nutrition,food elements. It helps to know about daily requirement of nutrients. To have knowledge about balance diet, food absorption etc. food preparation n preservation can also learn form it.
What is contribution in science?
A contribution is the act of giving something in order to help achieve or bring about some result.
Who created the periodic table as you know it today?
Short Answer:The creation of the Periodic Table of the Elements is credited to Dmitri Mendeleev.Long Answer:The Periodic Table of the Elements has no one creator. It has ten official contributors and is still being added to today. Here is a list of contributors, date of contribution, and the contribution as best as I can type it in this box.Aristotle -- ~330 BC -- Four element theory: earth, air, fire, and water.Antoine Lavoisier -- ~1770-1789 -- Wrote the first extensive list of elements containing 33 elements. Distinguished between metals and nonmetals.Jöns Jacob Berzelius -- 1828 -- Developed a table of atomic weights. Introduced letters to symbolize elements.Johann Döbereiner -- 1829 -- Developed 'triads', groups of three elements with similar properties.Lithium, sodium, and potassium formed a triad.Calcium, strontium, and barium formed a triad.Chlorine, bromine, and iodine formed a triad.John Newlands -- 1864 -- The known elements (less than 60) were arranged in order of atomic weights and observed similarities between the first and ninth elements, the second and tenth elements etc. He proposed the 'Law of Octaves'.Lothar Meyer -- 1869 -- Compiled a Periodic Table of 56 elements based on the periodicity of properties such as molar volume when arranged in order of atomic weight.Dmitri Mendeleev -- 1869 -- Produced a table based on atomic weights but arranged 'periodically' with elements with similar properties under each other. Gaps were left for elements that were unknown at that time and their predicted properties (the elements were gallium, scandium, and germanium). The order of elements was re-arranged if their properties dictated it, eg, tellerium is heavier than iodine but comes before it in the Periodic Table.William Ramsay -- 1894 -- Discovered the Noble Gases.Henry Moseley -- 1914 -- Determined the atomic number of each of the elements. He modified the 'Periodic Law' to read that the properties of the elements vary periodically with their atomic numbers.Glenn Seaborg -- 1940 -- Synthesised transuranic elements (the elements after uranium in the periodic table).
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......
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
Which kind of properties fell into families or groups in Mendeleevs system of elements?
Non-metals and Metalloids
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.
Which two elements on the periodic tabel would have been placed in different groups in moseleys periodic table but not in mendeleevs?
bi and po
Who is mendeleevs?
Dmitri Mendeleev was a Russian chemist; he proposed the modern Periodic Table of elements in 1869.
How did later chemists change Mendeleevs periodic table?
They used atomic number instead of Atomic Mass to organize the elements
