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In 1869, Dmitri Mendeleev created the first full version of the Periodic Table, including all known elements and leaving places for:
- Ekaboron or scandium
- Ekaaluminium or gallium
- Ekamanganese or technetium
- Ekasilicon or germanium
Scientists continue filling up the table as new elements are found, a process that goes on today.
What else can I help you with?
Why hydrogen OUTSIDE place in periodic table?
Hydrogen is placed outside the main group of elements in the periodic table because it has properties that are unique compared to other elements in that group. It has properties of both metals and nonmetals and does not fit neatly into any one group based on its characteristics. Additionally, hydrogen has only one electron, which is more similar to the alkali metals in Group 1, but its chemistry and behavior are distinct from them.
Why did Mendeleev place iodine in the same group as fluorine?
Mendeleev placed iodine in the same group as fluorine because both elements have similar chemical properties, such as forming compounds with similar stoichiometry and showing similar reactivity patterns. This classification allowed Mendeleev to identify a pattern in the properties of elements and lay the foundation for the modern periodic table.
By what two characteristics are all the elements of the periodic table placed in a particular row and column?
Elements in the periodic table are placed in rows and columns based on their atomic number and chemical properties. Rows, also known as periods, indicate the number of electron shells an element has, while columns, or groups, show elements with similar chemical properties due to the same number of valence electrons. This organization helps to predict an element's behavior and reactivity based on its location in the table.
Why did chemists in 1869 not agree with Mendeleev's periodic table?
Everything. LoL, it was made by a female.
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.
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.
Why elements are place in a group?
Elements with similar electron configurations are placed in the same group.
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.
Why hydrogen OUTSIDE place in periodic table?
Hydrogen is placed outside the main group of elements in the periodic table because it has properties that are unique compared to other elements in that group. It has properties of both metals and nonmetals and does not fit neatly into any one group based on its characteristics. Additionally, hydrogen has only one electron, which is more similar to the alkali metals in Group 1, but its chemistry and behavior are distinct from them.
Which elements in the periodic table are by the place?
Metals are placed at the left. Non-metals are placed at right in periodic table.
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.
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.
What properties can be predicted by the elements place on the periodic table?
Monkey123 will fly p456urple
Why are elements place in the same column of the periodic table?
They have similar properties, usually.
Why did Mendeleev place iodine in the same group as fluorine?
Mendeleev placed iodine in the same group as fluorine because both elements have similar chemical properties, such as forming compounds with similar stoichiometry and showing similar reactivity patterns. This classification allowed Mendeleev to identify a pattern in the properties of elements and lay the foundation for the modern periodic table.
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.
By what two characteristics are all the elements of the periodic table placed in a particular row and column?
Elements in the periodic table are placed in rows and columns based on their atomic number and chemical properties. Rows, also known as periods, indicate the number of electron shells an element has, while columns, or groups, show elements with similar chemical properties due to the same number of valence electrons. This organization helps to predict an element's behavior and reactivity based on its location in the table.
