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Why is atomic number better than atomic mass for organizing the elements in the periodic table?
Wiki User
∙ 12y ago
Atomic number is a unique number for each element. No two elements have the same atomic number. Atomic number is also the number of protons in the nuclei of the atoms of any given atom. Atomic Mass, however, is the number of protons, neutrons and electrons. The number of neutrons can vary with different isotopes of the same element, this means that atomic mass can vary with different isotopes. So atomic number does not vary, but atomic mass does, so it is more logical to use atomic number to organize the elements. In addition, when the elements are arranged according to atomic number into seven rows and 18 columns, it becomes evident that there are certain trends that occur across the periods, and that elements in the same group have similar properties.
Wiki User
∙ 12y ago
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How atomic number better than atomic mass?
No two elements may have the same atomic number. But two elements may have same atomic mass. Hence atomic number is better than atomic mass.
How is an atoms atomic number related to it's number of protons?
The atomic number IS the number of protons. Elements are classified based on their proton count since no two elements have the same number of protons. This is better than the old periodic table where elements were classified by atomic mass since isotopes exist.
Why was basis of classification of element in the periodic table changed from atomic mass to atomic number?
Mendeleev's periodic table was based on the atomic masses of elements. However, this was not effective when isotopes were discovered. An isotope of an element is defined as the element having the same atomic number but varying mass numbers. So, mass numbers weren't constant and hence, a better characteristic was chosen -atomic number. Atomic number of any element was a characteristic of a particular element. Hence atomic numbers were taken as the basis of classification instead of atomic masses.
Which elements in the periodic table are better conductors of heat?
The better conducters of heat are the metals
Why is it better to arrange elements in terms of their electronic structure and not in order of their relative atomic masses?
It's not better to do that for everyone, but it certainly is for chemists, since the electron structure of atoms is the building blocks for pretty much...everything they study. Nuclear physicists would surely rather arrange the elements based on atomic masses, for...something I'm sure. Fortunately, the Periodic Table of the Elements has them arranged both ways at the same time, whew!
What atomic number does sodium have on the periodic table?
The atomic number that sodium has in periodic table is 11 and valency is 1. The periodic table is a kind of table that was invented for the better study of elements and other types of compound. It makes the systematic study of elements.
What is the difference between the new and old periodic table?
Well, Back when Medeleev made this table, many of the elements were not even discovered yet. He plotted only the elements that he knew on his table. He organized them by increasing atomic weight. He didn't know all the elements so he would put question marks and empty spaces in the spots he thought elements would be and left to be found by other scientist. He happened to be true about the missing elements and that scientist did end up finding these "missing links" of the periodic table and led to the new or modern periodic table. The modern periodic table doesnt have any missing elements and they changed Medeleev's way of organizing the table by increasing atomic weight to increasing atomic number. So the newer form of the periodic table was complete and made it easier to find what elements react better with other elements. This making the modern table became the more efficent table of our time.
How atomic number better than atomic mass?
No two elements may have the same atomic number. But two elements may have same atomic mass. Hence atomic number is better than atomic mass.
What are the differences between Mendeleev and modern periodic table?
Mendeleev invented the periodic table in 1869. In those days there were still elements missing, they had no idea of what electrons were or how they related to chemistry, or how the nucleus related to atomic weight.; but they're really the same charts.
A periodic table?
* ei., can u pls look at the internet?! der is the original picture of the first periodic table by mendeleev... try this site... about.com., then look 4 chemistry., * or much better try to look through yahoo., type this one... mendeleev's first periodic table of elements then click at the one who's... Mendeleev'sPeriodic Table of the Elements is that ok???!!! * ei., can u pls look at the internet?! der is the original picture of the first periodic table by mendeleev... try this site... about.com., then look 4 chemistry., * or much better try to look through yahoo., type this one... mendeleev's first periodic table of elements then click at the one who's... Mendeleev's Periodic Table of the Elements is that ok???!!!
Who invented piriodic table?
Dmitri Mendeleev created the first periodic table according to atomic mass in 1869. Others before Mendeleev had organized the elements according to their properties and were able to discern periodicity, although Mendeleev is generally accepted as the creator of the table.With the information he gathered about the elements, he was able to see that there were missing elements that hadn't been discovered. He could figure out the atomic masses of the missing elements by averaging the atomic masses of the elements above and below the missing one. One such element, which he called "eka-silicon" (eventually Ge) was missing, but with understanding of the patterns the periodic table made, he predicted the elements appearance, melting point, atomic mass, density, formula of oxide, and formula of chloride.Throughout the years, other scientists were able to find or create these missing elements to form the table we know today. Today's periodic table is ordered by atomic number instead of atomic mass (as Mendeleev had started). Henry Moseley was the first to order the elements by atomic number so elements would fit together in groups/families and periods better in 1913.
How is an atoms atomic number related to it's number of protons?
The atomic number IS the number of protons. Elements are classified based on their proton count since no two elements have the same number of protons. This is better than the old periodic table where elements were classified by atomic mass since isotopes exist.
Why was basis of classification of element in the periodic table changed from atomic mass to atomic number?
Mendeleev's periodic table was based on the atomic masses of elements. However, this was not effective when isotopes were discovered. An isotope of an element is defined as the element having the same atomic number but varying mass numbers. So, mass numbers weren't constant and hence, a better characteristic was chosen -atomic number. Atomic number of any element was a characteristic of a particular element. Hence atomic numbers were taken as the basis of classification instead of atomic masses.
Which elements in the periodic table are better conductors of heat?
The better conducters of heat are the metals
Which elements of the periodic table are metals and nonmetals?
metals elements conduct electricity better than nonmetals elements but not as well as metalloid elements
Why is it better to arrange elements in terms of their electronic structure and not in order of their relative atomic masses?
It's not better to do that for everyone, but it certainly is for chemists, since the electron structure of atoms is the building blocks for pretty much...everything they study. Nuclear physicists would surely rather arrange the elements based on atomic masses, for...something I'm sure. Fortunately, the Periodic Table of the Elements has them arranged both ways at the same time, whew!
Why do suppose that the word periodic is used to describe the periodic table?
Because the table repeats itself according to similar chemical properties (i.e. those elements with 5 valence electrons all behave similarly to each other, thus they are in the same column), the properties of the elements periodically repeat themselves as the number of valence electrons (those in the s and p shells) reach 8 and a new valence shell begins.
