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What are the defects in mendeleev's periodic table?
His periodic was not in complete accordance with what he was classifying with i.e classification with respect to ascending atomic mass. here is an example: the atomic mass of the Ar is 39.9 and that of sodium is 39 but he placed Ar in the zero group and Na in the 1st group. this is one example. his periodic table had some more defects like this. this defect was observed when the true atomic masses were known. In his time the true atomic masses were not known. This was one of the reason for the failure of his periodic table.
What is the reason for the formation of hybridized orbitals in the bonging of carbon atoms as they form organic molecules?
The basic reason of atomic orbitals hybridization is the repulsive force among the electrons pairs around the central atom of a molecule.
Is the reason that an element's average atomic mas is often a decimal number stems from the fact that elements have isotopes?
Yes, the reason that an element's average atomic mass is often a decimal number is the fact that most elements have more than one isotope stable against radioactive decay and that these isotopes, each of which individually has an integral mass number, occur naturally in amounts that do not lead to integral average gram atomic masses.
How do you write an accordion paragraph?
Topic Sentence * 1st Supporting detail/reason/fact * Explain * Explain * 2nd Supporting detail/reason/fact * Explain * Explain * 3rd Supporting detail/reason/fact * Explain * Explain Conclusion
Why is not a reason why the mass of an atom is expressed in atomic mass units rather than in grams?
Atoms are very tiny. Expressing their masses in grams would require unusual prefixes like "-yocto" or cumbersome scientific notation. One AMU is equal to 1.66*10-24g. It's easier to compare the masses of atoms by using a special unit.
Why mass number of are always whole number?
The main reason is that many elements exist in several isotopic forms. These are atoms with the same number of protons and electrons but different numbers of neutrons. Since the atomic mass is essentially based on the number of protons and neutrons in each atom, the element will exist in several forms with different masses. The atomic mass is the average of the masses of these isotopes, weighted together according to their abundance.
Are the atomic masses of some elements actually fractional?
Atomic mass is not the same as atomic weight. It refers to the weight in amu (atomic mass units ) of a specific isotope. These weights are not whole numbers, the mass of protons and neutrons are slightly different and there is the phenomenon of binding energy of the nucleus which is obseved as a difference in mass (sometimes expressed as the packing fraction). For atomic weights the main reason is that naturally occuring elements consist of mixtures of isotopes.
Why is the atomic mass of sodium 22.990 and not 22?
The atomic mass of sodium is 22.990 because it is an average mass of all naturally occurring isotopes of sodium, taking into account their relative abundances. Sodium has multiple isotopes with slightly different masses, which contributes to the atomic mass being a non-integer value.
WHAT IS A REASON FOR THE Texans 'LOVE OF THE TREATY OAK?
no explain the reason for the Texas love of the treaty oak
Who used the power of reason to explain society?
Enlightenment Thinkers used the power of reason to explain how society works.
Why was the radio built?
One reason would be to improve communication to the masses
Who used the power to reason of explain how society works?
Enlightenment Thinkers used the power of reason to explain how society works.
