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Why did Mendeleev place zinc in the same group as calcium?
They both have 2 valence electrons and have similar reactivity.
Mendeleev's decision to leave gaps in his perodic table was supported by the discovery of?
Yes; in his time not every element was known. As every element in the same column (group) has more or less the same chemical properties, he predicted there should be an element that was not yet discovered at some places. For example, under Silicon, there was a gap where he suspected that, to complete the pattern, a new element was missing; he called it eka-silicon, and correctly predicted many of its properties. The new element was found later, with properties very similar to the predictions; it was eventually called Germanium.
Does a isotope of a element have more protons?
All isotopes of an element have the same number of protons, otherwise they would not be the same element. What varies is the number of neutrons, they can be more or less than in the stable isotope(s) of the element.
Where on the periodic table can you find an element that has the same chemical properties as another element but is more massive than that element?
In the same column (group) but in a row below the chemical you start with.
How is moseleys basis for arranging the elements different from mendelees?
Moseley's basis and Mendeleev's basis both involved experimental measurements. But Moseley's involved X-ray properties, and X-rays were not discovered when Mendeleev first stated the Periodic Law. Atomic weight and atomic number follow nearly the same sequence, but there are three cases of reversal of order: Argon element 18 atomic weight 40.0; potassium element 19 atomic weight 39.1. (Argon was not discovered until 1894; first periodic table 1869). Cobalt element 27 atomic weight 58.9; nickel element 28 atomic weight 58.7. (Very small difference; Mendeleev gave these two elements identical atomic weights) Tellurium element 52 atomic weight 127.6; iodine element 53 atomic weight 126.9 (Major problem for Mendeleev -- he insisted that the atomic weight of tellurium had to be 125, but careful re-measurements continued to show 127.5-128) Moseley's atomic number is definitely a better basis for the periodic law than Mendeleev's original suggestion of atomic weight.
What describes mendeleev use of the term eka-aluminum?
Mendeleev used the term "eka-aluminum" to predict the properties of an undiscovered element that would have similar characteristics to aluminum. This was part of his periodic table where he left gaps for undiscovered elements. Eka-aluminum was later discovered and named gallium, confirming Mendeleev's periodic trends.
Why did Mendeleev place zinc in the same group as calcium?
They both have 2 valence electrons and have similar reactivity.
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 was Mendeleev's hypothesis about the element?
Mendeleev hypothesized that the properties of elements are related to their atomic weights, and he arranged the elements into the periodic table based on this concept. He predicted the existence and properties of undiscovered elements, like germanium and gallium, based on gaps in the table.
What is the science of Mendeleev's research?
Well Mendeleev constructed the first well detailed periodic table based on the atomic masses of each element. The elements were arranged in an increasing order of their atomic masses. His principle was that the increasing atomic mass determines the periodic properties of each element. This eventually led him to predict new elements. But his table had some flaws one of them being that hydrogen had same characteristics as that of alkali metals and halogens. Another being that the isotopes had no place in the periodic table.
Did mendeleev group the elements by density?
No, Mendeleev grouped the elements by atomic mass and chemical properties to create the periodic table. While there may be some correlation between element density and position on the periodic table, density was not the primary factor Mendeleev used for organization.
Mendeleev's decision to leave gaps in his perodic table was supported by the discovery of?
Yes; in his time not every element was known. As every element in the same column (group) has more or less the same chemical properties, he predicted there should be an element that was not yet discovered at some places. For example, under Silicon, there was a gap where he suspected that, to complete the pattern, a new element was missing; he called it eka-silicon, and correctly predicted many of its properties. The new element was found later, with properties very similar to the predictions; it was eventually called Germanium.
What method did mendeleev use to organize the element?
Dmitri Mendeleev organized the elements based on their atomic mass, grouping similar elements together and leaving gaps for undiscovered elements. This led to the creation of the periodic table, where elements with similar properties were placed in the same column.
Does a isotope of a element have more protons?
All isotopes of an element have the same number of protons, otherwise they would not be the same element. What varies is the number of neutrons, they can be more or less than in the stable isotope(s) of the element.
What is and what is an diagram element of a What is an element?
An element is an substance that can't be broken into two or more simpler substances. An element is small but significant presence of a feeling or abstract quality. Some of them are put in the periodic table of elements which was made by Dmitri Mendeleev.An element is an substance that can't be broken into two or more simplersubstances. Element is a small but significant presence of a feeling or abstract quality Some of them are put in the periodic table of elements which was made by Dmitri Mendeleev.
What is needed for any given element?
An element is defined a "type of atom"; to be more precise, all the atoms in an element have the same number of protons (but not necessarily the same number of neutrons).
Where on the periodic table can you find an element that has the same chemical properties as another element but is more massive than that element?
In the same column (group) but in a row below the chemical you start with.
