0
What else can I help you with?
What happens where two elements have the same atomic number?
When two elements have the same atomic number, it means they are isotopes of each other. Isotopes have the same number of protons but different numbers of neutrons in their nuclei. This results in subtle differences in their atomic mass and stability.
Which isotopes of uncharged elements have different numbers?
Isotopes of uncharged elements have the same number of protons (which determines the element), but different numbers of neutrons. For example, carbon-12 and carbon-14 are isotopes of carbon with different numbers of neutrons but the same number of protons.
Why are atomic masses of elements usually not whole numbers?
The atomic mass listed in the periodic is found by taking the average of all the different isotopes of a given element found in nature, weighted for their natural abundance.Note that the atomic mass is not the same as the atomic weight. The atomic mass is the weight of one specific isotope of one atom, and is expressed in "atomic mass units" or amu. The atomic weight is expressed in grams per mole (g/mol) and is the weighted average of all the isotopes weighted by their abundance.See the Web Links for more information about atomic mass and atomic weight.
What is the difference in the modern periodic table and Mendeleev's table?
The periodic table is now complete and can be displayed using the integral atomic numbers. In Mendeleev's time there were still unknown elements. In fact, one of the primary uses of his table was to predict the properties of elements that had not yet been isolated. (His 1869 table included speculative names for some expected elements.) -- In Mendeleev's periodic table, transition elements were placed in another group. --In Mendeleev's periodic table, noble gases were written on left side. In the modern periodic table, noble gases are written on right side.
How are the atomic numbers and the atomic masses of the elements related to how the elements are arranged on peridoic table?
Elements are arranged in a periodic table by atomic number, lower on top and left. Atomic masses have no direct relationship to the arrangement of atoms, although generally atoms with higher atomic numbers will have higher atomic masses. (There are at least three exceptions for atoms with atomic numbers differing by 1.)
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 makes isotopes different from elements on the periodic table?
Isotopes are variants of elements with the same number of protons but different number of neutrons, leading to varying atomic masses. Elements on the periodic table represent the different types of atoms identified by the number of protons in their nucleus. Isotopes of an element have similar chemical properties but may have different physical properties due to variances in atomic mass.
How will the modern periodic table be disturbed if isotopes of an element are discovered now?
The periodic table would be disturbed only if isotopes of a new element are discovered, because a periodic table is based on order of atomic number, not atomic mass. If new isotopes of a previously known element were discovered, the atomic mass shown in the periodic table might be changed, but this is very unlikely because the atomic masses shown in a periodic table are based on the naturally occurring distribution of isotopes, and any newly discovered isotopes would probably occur only in very small fractions of the total.
How were the positions of isotopes resolved in modern periodic table?
The positions of isotopes in the modern periodic table are not explicitly shown; instead, elements are represented as whole entities, with isotopes being variations of these elements based on their neutron count. The periodic table is organized by atomic number, which corresponds to the number of protons in an element's nucleus. Isotopes of an element share the same atomic number but have different atomic masses due to varying numbers of neutrons. The average atomic mass listed on the table reflects the weighted average of all naturally occurring isotopes of an element.
Why are isotopes not found on different sections of the periodic table?
Isotopes are not found on different sections of the periodic table because isotopes have the same number of protons and electrons as the element they correspond to, so they are placed in the same position on the table based on their atomic number. The different isotopes of an element have a different number of neutrons, which affects their atomic mass but not their position on the periodic table.
Why don't the elements on the periodic table have a whole number as their atomic weight?
Elements exist as isotopes in nature. So their atomic weight is not a whole number.
Does the periodic table gives the mass number of the most common isotopes of an element?
The periodic table give the atomic numbers and the atomic weights of chemical elements.
How does the isotopes chlorine-35 and 37 occupy the same place in the periodic table?
Isotopes of Chlorine-35 and 37 have different atomic wt. but same atomic number. And in the modern periodic table, the elements are arranged in order of their atomic number AND NOT atomic wt. hence, Chlorine-35 and 37 occupy same place in the periodic table.
What is an element's atomic mass not listed as a whole number on the periodic table?
Few elements have isotopes. their atomic mass is not a whole number.
How scovery of isotopes explain why atomic wieghts do not always give the correct order of elements?
This is due to the fact that all elements have isotopes, meaning that there atomic weight is in fact much greater than stated in the periodic table. This means that the elements are only weighed by their compound and not including the isotopes.
What isotopes of uncharded elements have different numbers?
The atomic number of the isotopes of an element is identical; the mass number is different.
Why isotopes have same position in periodic table?
Isotopes have the same position in the periodic table because they have the same number of protons, which determines the element they belong to. However, they differ in the number of neutrons, which results in different atomic masses.
