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प्रश्न
What physical and chemical properties of elements did Mendeleev consider in compiling the periodic table?
उत्तर
The physical and chemical properties of elements that Mendeleev considered while compiling periodic table were:
- The molecular formulae of hydrides and oxides of the elements
- melting points, boiling points and densities of the elements and their hydrides and oxides.
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संबंधित प्रश्न
What are the main features of Mendeleev’s periodic table?
Name three elements with filled outermost shells.
On what basis did mandeleev arrange the elements in his periodic table?
Name the Russian chemist who said that the properties of elements are a periodic function of their atomic masses.
What were the two criteria used by Mendeleev to classify the elements in his periodic table?
Why did Mendel choose garden pea for his experiments? Write two reasons.
Explain in brief how Mendel interpreted his results to show that the traits may be dominant or recessive.
Write the merits of Mendeleev’s periodic table.
State Mendeleev's periodic law.
Use Mendeleev's Periodic Table to predict the formula of hydrides of carbon and silicon.
Use Mendeleev's Periodic Table to predict the formula of oxides of potassium, aluminum, and barium.
Why did Mendeleev's leave some gaps in his periodic table os elements? Explain your answer with an example.
Name two elements whose atomic weights were corrected on the basis of their positions in Mendeleev's periodic table.
How many elements were known at the time of Mendeleev's classification of elements?
What were the defects and anomalies in Mendeleeff's Periodic Table and how are they resolved by Moseley?
Write the molecular formula of the oxide of any one of the elements in Mendeleev’s periodic table.
Which two elements show an ambiguity regarding their sequence in Mendeleev’s periodic table?
According to Mendeleev’s periodic law properties of elements are ______.
Write scientific reason.
Mendeleev kept vacant places in the periodic table.
Write scientific reason.
There was no definitive place for isotope in Mendeleev’s periodic table.
State Mendeleev’s Periodic Law.
Distinguish between:
Mendeleev’s periodic table - Modern periodic table
What challenges did Mendeleev face in following periodic law?
The properties of eka-aluminum predicted by Mendeleev are the same as the properties of a later discovered elements: ______
Which of the following oxide is most basic?
Which of the following are the characteristics of isotopes of an element?
(i) Isotopes of an element have the same atomic masses
(ii) Isotopes of an element have the same atomic number
(iii) Isotopes of an element show the same physical properties
(iv) Isotopes of an element show the same chemical properties
Which of the following properties does not match the element of the halogen family?
The total number of electrons present in the first twenty elements of the periodic table is ______
Eka-aluminium and Eka-silicon are known as ______
According to Mendeléev's Periodic Law, the elements were arranged in the periodic table in the order of
In Mendeléev’s Periodic Table the elements were arranged in the increasing order of their atomic masses. However, cobalt with atomic mass of 58.93 amu was placed before nickel having an atomic mass of 58.71 amu. Give reason for the same.
Write the formulae of chlorides of Eka-silicon and Eka-aluminium, the elements predicted by Mendeléev.
State Mendeleev’s Law of Periodicity.
Mendeleev's periodic table was based on ______.
