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How did Mendeleev arrange the periodic table without knowing the atomic masses of each element?
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Why is the periodic table more successful than other proceeding attempts?
Because the elements are grouped according to similar characteristics. Even by knowing where an element is on the periodic table based solely on its proton number, we can still predict its properties by using its position on the periodic table.
What can you infer by just knowing the atomic mass of an element?
The number of protons.
How do you find how many electrons an atom has?
Knowing which element it is and its formal charge, subtract the charge from its atomic number.
What essential element of this strategy proved to be a waekness?
Without knowing the strategy to which you're referring it would be difficult to answer this question.
What information about a representative element can you get from just knowing its group number?
The number of electrons it has in the highest occupied energy level.
Did someone make the periodic table?
Yes, Dmitri Mendeleev made the Periodic Table of Elements, and interestingly enough, he did it without knowing all of the natural elements! As scientists discovered new elements, they realized the elements fit right into place on Dmitri's table.
Can you determine the element with only knowing the number of protons?
The number of protons is the "atomic number", so you look that up in the periodic table.
When looking at a periodic table of elements what do you know by knowing in which column an element appears?
Chemical elements in the same group have similar chemical properties.
What does an element's atomic number tell about that element?
The atomic number is the number of protons and defines an element. It really only indicates the element of a given atom which can be linked to other properties such as atomic mass or location on the periodic table and anything else knowing the element tells you.
What does an element atomic number tell about that element?
The atomic number is the number of protons and defines an element. It really only indicates the element of a given atom which can be linked to other properties such as Atomic Mass or location on the Periodic Table and anything else knowing the element tells you.
Why is the periodic table more successful than other proceeding attempts?
Because the elements are grouped according to similar characteristics. Even by knowing where an element is on the periodic table based solely on its proton number, we can still predict its properties by using its position on the periodic table.
What element on the periodic table is a water and gin combo for a pun?
The greek prefix for water is "Hydro". Knowing this, put the two together, fudge the pronunciation, and..... HYDROGEN (H2)
What is the half-life of this element?
Without knowing the element and the specific isotope, this has no answer.
First person to arrange elements in a table?
Dmitri MendeleevIn ancient Greece, Aristotle postulated that there were four elements (fire, water, earth, air) and arranged these accordingly. Later on when science began to theorize (and later prove) the existence of atomic elements without the benefit of knowing the subatomic properties involved, people sorted them in many different ways.In 1829 Döbereiner proposed the Law of Triads: The middle element in the triad had atomic weight that was the average of the other two members.The English chemist John Newlands, noticed in 1865 that when placed in order of increasing atomic weight, elements of similar physical and chemical properties recurred at intervals of eight, which he likened to the octaves of music. As knowledge about subatomic particles increased, this system proved unreliable and fell into disfavor.The modern periodic table of elements which is based on both atomic weights and chemical properties was developed by Dmitri Ivanovich Mendeleev in 1869. Four months later, a German professor Julius Lothar Meyer independently developed a periodic table similar to Mendeleev's.However, Mendeleev plotted a few elements out of strict mass sequence in order to make a better match to the properties of their neighbors in the table, corrected mistakes in the values of several atomic masses, and predicted the existence and properties of a few new elements in the empty cells of his table. Mendeleev was later vindicated by the discovery of the electronic structure of the elements in the late 19th and early 20th century.Mendeleev's periodic table also successfully predicted the future discovery of several elements, and has thus become the de-facto standard for the organization and display of the elements.The person you're looking for is Gregor Mendeleev.
C program to duplicate element from a set of elements?
Cannot be solved without knowing what an 'Element' is.
What are 2 main divisions of the periodic table?
DEFINITION:The orderly arrangement of elements is called "PERIODIC CLASSIFICATION".INTRODUCTION: When a very large number of elements become known to scientists , it was felt that they must be arranged in a systematic order because a systematic classification provides a clear idea and information about the properties of elements and make it easier to predict the properties of different elements. This classification provides the inter-relationship of scientific facts.Early Attempts at Classification Of Element:In old days, element were arranged in the ascending order of their atomic masses.1.Law of Triads/ DOBEREINER'S TRIADS:In 1829, a German scientist Dobereiner made use of the relationship between atomic masses and properties of elements.Drawback:This rule is not for all the elements.2.NEWLAND'S law of octave:In 1866, a British scientist, Newlands, reported his "law of octave" by arranging elements according to increasing order of their atomic masses. He noticed that "Every eight element, starting form any point, approximately has similar properties".Newland's arrangement was applicable only to a few elements after that it was failed.3.LUTHER MEYER'S CLASSIFICATION:In 1864, a German Chemist Luther Meyer published on incomplete periodic table .He included about 56 elements arranged in a group from I to VIII. He plotted the values of different physical properties and obtained different curves .In these graphs, he observed that element with similar physical properties occupy similar positions in the curveFor example :Alkali metals occupy the peak of the curves.Halogen occur on the ascending portions of the curve.4.MENDELEEV'S PERIODIC TABLE:In 1869, a Russian chemist, Mendeleev, on the basis of physical and chemical properties discovered a relation known as "PERIODIC LAW".According to the law:"The properties of element are the periodic function of their atomic masses".Mendeleev arranged the known elements according to increasing order of their atomic masses because,according to him fundamental property of an element was atomic mass.He further divided and arranged these eight groups into subgroups.Mendeleev's periodic table was very precise and provided the basis of modern periodic classification.Original statement of Mendeleev's periodic law:1.The elements,if arranged according to their atomic weights show an evident periodicity of properties.2.Elements which are similar with regards to their chemical properties have atomic weights which are either nearly the same value or which increase regularly.3.The arrangement of the elements or of groups of elements in the order of their atomic weights,corresponds with their so called valencies.4.The elements which are most widely distributed in nature have small atomic weights and sharply defined properties.They are therefore typical elements.5.The magnitude of the atomic weight determines the character of an element.6.The discovery of many as yet unknown elements may be expected.7.The atomic weight of an element may sometimes be corrected by the aid of a knowledge of those of adjacent elements.8.Certain characteristic properties of the elements can be foretold from their atomic weights.MERITS OF MENDELEEV'S PERIODIC TABLEMendeleev's periodic table offered the following advantages in understanding the properties of elements.1. There was a regular gradation in physical and chemical properties of elements.2. The group number of an element indicates highest oxidation state that it can attain.3. There were many vacant spaces in Mendeleev's periodic table for the elements to be discovered.He named them Eka-Boron, Eka-Aluminium and Eka-silicone He also predicted the properties of these undiscovered elements including atomic masses.These elements were discovered as Sc ,Ga and Ge with same features as he predicted.4. Mendeleev's arrangement helped to correct atomic masses of a number of elements.DEMERITS IN MENDELEEV'S PERIODIC TABLE1. For placing the elements in proper groups,the order of the elements according to atomic mass was reversed in certain cases. He placed Iodine (127) after Tellurium (128) Potassium (39) and Ni (58)after Co (59).Which is against his periodic law but correct according to properties.2. Mendeleev's periodic table does not provide a clear idea about the structure of atom.3. Lanthanide and Actinide have been assigned places in the periodic table which is against the periodic law.4. Alkali metal and coinage metals (Cu,Ag and Au) which differ widely in properties are placed into the same group.5. There is no separate position for isotopes in his periodic table.6. The change in atomic mass of two successive elements is not constant. Hence it is not possible to predict the number of missing elements by knowing the atomic masses of two known elements. DIC TABLE1. For placing the elements in proper groups, the order of the elements according to atomic mass was reversed in certain cases. He placed Iodine (127) after Tellurium (128) Potassium (39) and Ni (58) after Co (59). Which is against his periodic law but correct according to properties.2. Mendeleev's periodic table does not provide a clear idea about the structure of atom.3. have been assigned places in the periodic table which is against the periodic law.4. Alkali metal and coinage metals (Cu, Ag and Au) which differ widely in properties are placed into the same group.5. There is no separate position for isotopes in his periodic table.6. The change in atomic mass of two successive elements is not constant. Hence it is not possible to predict the number of missing elements by knowing the atomic masses of two known elements.DEMERITS IN MENDELEEV'S PERIODIC TABLE1. For placing the elements in proper groups, the order of the elements according to atomic mass was reversed in certain cases. He placed Iodine (127) after Tellurium (128) Potassium (39) and Ni (58) after Co (59). Which is against his periodic law but correct according to properties.2. Mendeleev's periodic table does not provide a clear idea about the structure of atom.3.have been assigned places in the periodic table which is against the periodic law.4. Alkali metal and coinage metals (Cu,Ag and Au) which differ widely in properties are placed into the same group.5. There is no separate position for isotopes in his periodic table.6. The change in atomic mass of two successive elements is not constant. Hence it is not possible to predict the number of missing elements by knowing the atomic masses of two known elements.
What is the relationship between an atom's location on the periodic table and how it bonds?
- atomic number of an element - group and period of an element - the most common valence - the reactivity of an element - the state of matter of an element - natural or artificial elements - an evaluation of chemical and physical properties - gases, metals, metalloids etc.
