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How did bohr's new model account for the periodic repetition of properties of the elements?
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Why is the table of elements known as the periodic table?
Simply, the periodic table is set up by listing elements by their atomic number, or the number of protons in an atom's nucleus.
What did the gaps on Mendeleev's tabel represent?
He predicted that elements with the predicted properties would be discovered to fill in these gaps.
Mass number Why is it not the number on the periodic table?
Elements have different isotopes and each isotope will have different atomic mass. As such it is not possible to list the mass number of all the isotopes on the periodic table. However, the atomic mass is generally given on the periodic table which is generally calculated taking into account all the isotopes and its percentage.
How many metalloids periodic table?
There are 7 metalloids on the Periodic Table of Elements:Boron (B)Silicon (Si)Germanium (Ge)Arsenic (As)Antimony (Sb)Tellurium (Te)Polonium (Po)
How do elements get their names?
Today names for new elements are approved by IUPAC after consultation with many interested parties and taking into account the authors' proposal.
What problem in periodic table of Lothar Meyer?
Lothar Meyer's periodic table did not account for all known elements and did not correctly predict the properties of undiscovered elements. Additionally, it did not account for the concept of atomic number, which led to inconsistencies in the ordering of elements. Meyer's table also lacked a clear underlying periodic trend.
Why is the table of elements known as the periodic table?
Simply, the periodic table is set up by listing elements by their atomic number, or the number of protons in an atom's nucleus.
What are the elements in the periodic table based on?
Atomic Number
What can be said about the percentage of elements found in significant amounts in Earth's biospherelithospherehydrospher and atmosphere compare to the total number of elements listed on the periodic t?
Only 4 elements account for 5% of the total and the top 8 elements, combined, account for 99.5 percent.
How Henry Moseley rearranged the periodic table?
Henry Moseley did a series of experiments looking at the x-ray spectra of various elements. He found that the frequencies of equivalent bands made a very simple progression that more or less corresponded to atomic weight order. The exceptions were exactly the same as the ones where Mendeleev's scheme was having difficulties. He thus arrived at a definition of atomic number, and proposed a revised periodic law where the ordering of elements was according to atomic number rather than atomic weight.
What did the gaps on Mendeleev's tabel represent?
He predicted that elements with the predicted properties would be discovered to fill in these gaps.
Which electrons account for many of the chemical and physical properties of elements?
This is rightThe outermost electrons account for many of the physical and chemical properties of elements.
Why barium and magnesium have similar chemical properties?
Both of them is an element and they have a symbol that repersent it also, they both have an atomic and mass number. also as they are both in group 2 of the periodic table, they both have two outer shell electrons that react so the sane number give the elements
Mass number Why is it not the number on the periodic table?
Elements have different isotopes and each isotope will have different atomic mass. As such it is not possible to list the mass number of all the isotopes on the periodic table. However, the atomic mass is generally given on the periodic table which is generally calculated taking into account all the isotopes and its percentage.
What is the limitations of dobereiner's classifications?
Dobereiner's classification system had limitations because it only grouped elements based on triads and did not account for all known elements at the time. Additionally, the system did not explain why elements within triads had similar chemical properties. It was also limited by its inability to accommodate elements that did not fit neatly into triads.
What is purchases account?
Purchase account is a record account in which all inventory purchases are noted. This is commonly used with the periodic inventory method.
What information did Mendeleev use to try to find a pattern in elements?
He used an atomic mass, and also an atomic mass of units. Therefore he was able to find the pattern. I got this answer off of Mr. Kebblers class.
