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How was the person who devised the first periodic table able to predict the behavior of elements such as gallium scandium and germanium that had not even been discovered yet?
The reason the periodic table was created in the first place was to illustrate the "periodic" physical properties of the known elements of the time. Because of this, the properties of elements that were "missing" from the table could be extrapolated from the periodic trends seen in the known elements.
Why are elements place in the same column of the periodic table?
They have similar properties, usually.
Why are the hydrides of mendeleevs group 1 and 7 placed in separate groups?
Mendeleev left gaps in his table to place elements not known at the time. By looking at the chemical properties and physical properties of the elements next to a gap, he could also predict the properties of these undiscovered elements. For example, Mendeleev predicted the existence of 'eka-silicon', which would fit into a gap next to silicon. The element germanium was discovered later. Its properties were found to be similar to the predicted ones and confirmed Mendeleev's periodic table.
Why Mendeleev put more than one element in one place?
Mendeleev put more than one element in one place, called a group or family, based on similarities in their chemical properties. This structure allowed him to predict the properties of undiscovered elements and accurately organize the periodic table. Grouping elements with similar properties together made it easier to understand their relationships and behavior.
What is a tool scientist use to organize the elements?
The elements are arranged in the increasing order of their atomic number and repeating properties.
How did Mendeleev drcide where to place arsenic and selenium on the periodic table?
Mendeleev placed arsenic and selenium on the periodic table based on their chemical properties and atomic masses. He arranged elements by increasing atomic mass and grouped them by similar properties. By doing so, he could predict the properties of undiscovered elements and fill in gaps in the periodic table.
How did Mendeleev place germanium on the periodic table?
Mendeleev was able to predict the properties of the yet unknown element (Germanium) by the properties of the surrounding known elements on his periodic table of the elements. Predicting properties such as reactivity, density, atomic mass, etc., he knew where the undiscovered element would be placed.
What can you predict from an elements place in th periodic table?
its valence electrons, its number of energy levels, how reactive it is, and some properties it has
What is the important work of dmitr mendeleev?
he invented an early version of the periodic table, and was able to use it to predict what unfound elements properties would be he follow the periodic law and place the similar elements according their mass number.
Who arrange the periodic table of elements?
the place where an element sits on a periodic table is not chosen by anyone. the place where it sits is chosen by it's atomic number or the number of protons it has eg lithium 3 protons its third
What are some properties mendeleev used to place the elements in order?
He mostly used this: -How much atomic mass (at first he used this method but he later corrected it to this:) -atomic number or the number of protons He used this to determined the order of the periodic table together:)
Did mendeleev's original table could accommodate elements that did not even exist?
Yes, Mendeleev's original periodic table had gaps to accommodate elements that were yet to be discovered. He even successfully predicted the properties of some of these missing elements based on his table's structure.
