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Mendellev’s periodic table is upset by the fact that
- a)Noble gases do not form compounds
- b)Many elements have several isotopes
- c)Atomic weights of element are not always whole numbers
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
Mendellev’s periodic table is upset by the fact thata)Noble gases do n...
Explanation:
Mendeleev’s periodic table is a tabular arrangement of chemical elements based on their atomic number, electron configuration, and chemical properties. The periodic table has been revised over time to accommodate new discoveries and scientific advancements. However, there are still some issues that upset Mendeleev’s periodic table. One of such issues is:
Many elements have several isotopes
Isotopes are atoms of the same element that have different numbers of neutrons in their nuclei. They have the same atomic number but different mass numbers. For example, carbon-12, carbon-13, and carbon-14 are isotopes of carbon. This means that they have the same number of protons (6) but different numbers of neutrons (6, 7, and 8 respectively).
The presence of isotopes of an element can upset Mendeleev’s periodic table because:
- The atomic mass of an element is not always a whole number: The atomic mass of an element is the weighted average of the masses of all its isotopes. Since isotopes have different masses, the atomic mass of an element may be a decimal number. This can be a problem when arranging elements in order of increasing atomic mass, which is one of the ways Mendeleev’s periodic table was organized.
- Isotopes have different physical and chemical properties: Although isotopes of an element have the same number of protons and electrons, they have different numbers of neutrons, which affects their physical and chemical properties. This means that different isotopes of an element may behave differently in chemical reactions, making it difficult to predict their behavior based on their position in the periodic table.
Conclusion:
Therefore, the presence of isotopes of an element can upset Mendeleev’s periodic table because they have different physical and chemical properties and the atomic mass of an element is not always a whole number.
Mendeleev’s periodic table is a tabular arrangement of chemical elements based on their atomic number, electron configuration, and chemical properties. The periodic table has been revised over time to accommodate new discoveries and scientific advancements. However, there are still some issues that upset Mendeleev’s periodic table. One of such issues is:
Many elements have several isotopes
Isotopes are atoms of the same element that have different numbers of neutrons in their nuclei. They have the same atomic number but different mass numbers. For example, carbon-12, carbon-13, and carbon-14 are isotopes of carbon. This means that they have the same number of protons (6) but different numbers of neutrons (6, 7, and 8 respectively).
The presence of isotopes of an element can upset Mendeleev’s periodic table because:
- The atomic mass of an element is not always a whole number: The atomic mass of an element is the weighted average of the masses of all its isotopes. Since isotopes have different masses, the atomic mass of an element may be a decimal number. This can be a problem when arranging elements in order of increasing atomic mass, which is one of the ways Mendeleev’s periodic table was organized.
- Isotopes have different physical and chemical properties: Although isotopes of an element have the same number of protons and electrons, they have different numbers of neutrons, which affects their physical and chemical properties. This means that different isotopes of an element may behave differently in chemical reactions, making it difficult to predict their behavior based on their position in the periodic table.
Conclusion:
Therefore, the presence of isotopes of an element can upset Mendeleev’s periodic table because they have different physical and chemical properties and the atomic mass of an element is not always a whole number.
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Mendellev’s periodic table is upset by the fact thata)Noble gases do n...
Ya because in mandaleev periodic table he arranged the elements on basis of atomic weights so isotopes have same atomic weights so he has no place for them in his periodic table
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Mendellev’s periodic table is upset by the fact thata)Noble gases do not form compoundsb)Many elements have several isotopesc)Atomic weights of element are not always whole numbersd) None of theseCorrect answer is option 'B'. Can you explain this answer?
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