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Why did Mendeleev place more than one element in the same place?
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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.
How many new elements did Mendeleev predict he would discover later on?
He predicted only 1 element. But you can look up that same question right here on this site. Hope this helps!
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.
What describes mendeleev use of the term eka-aluminum?
Gallium was named eka-aluminium by Mendeleev.
What was Mendeleev's hypothesis about the element?
Mendeleev states that all gases, at the same volume, temperature and pressure, contain the same number of molecules.
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.
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.
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.
How many new elements did Mendeleev predict he would discover later on?
He predicted only 1 element. But you can look up that same question right here on this site. Hope this helps!
A is substance in which one or more atoms have the same number of protons?
element
Which element is in the same group as Al aluminum?
B (boron) apex
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.
What is the difference in a compound and an element?
A compound is a combination of more than one element. (In an "element", all atoms - except perhaps for small amounts of impurities - have the same number of protons.)A compound is a combination of more than one element. (In an "element", all atoms - except perhaps for small amounts of impurities - have the same number of protons.)A compound is a combination of more than one element. (In an "element", all atoms - except perhaps for small amounts of impurities - have the same number of protons.)A compound is a combination of more than one element. (In an "element", all atoms - except perhaps for small amounts of impurities - have the same number of protons.)
