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In Mendeleev's period table, the elements were arranged by both weight and valence. Mendeleev noticed certain elements were very close in weight and properties and hypothesized other elements that would lie between them. These were the basis of groups. He also noticed weights increased regularly and formed these into periods.
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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.
What does the periodic table allow chemists to do?
Periodic table help to estimate the chemical and physical properties of elements.
How chemists use the periodic table?
as a reference tool
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
What type of scientists made the periodic table?
The periodic table was created by chemists, specifically Dmitri Mendeleev in 1869. Mendeleev organized the elements based on their properties and atomic weights to create a system that displayed the periodic trends of elements.
Why the improvement in Mendeleevs periodic table was made?
To understand the concept of Periodic Table
How did later chemists change Mendeleevs periodic table?
They used atomic number instead of Atomic Mass to organize the elements
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 period is Pb in?
How have chemists used the Periodic Table over time
Who uses the periodic table today?
Chemists
Why is the periodic table so valuablee for chemists?
Periodic table group elements with similar properties together. It makes study of elements easier for chemists.
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.
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 one problem that chemists in about 1800 had to solve before the periodic table?
What to use instead of the periodic table.
What does the periodic table allow chemists to do?
Periodic table help to estimate the chemical and physical properties of elements.
How do chemists organize information about elements?
By grouping the elements on the Periodic Table.
