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प्रश्न
According to Mendeleev’s periodic law properties of elements are ______.
उत्तर
According to Mendeleev’s periodic law properties of elements are a periodic function of their atomic masses.
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संबंधित प्रश्न
Use Mendeleev’s Periodic Table to predict the formulae for the oxides of the following elements:
K, C, Al, Si, Ba.
Name three elements with filled outermost shells.
Lithium, sodium, potassium are all metals that react with water to liberate hydrogen gas. Is there any similarity in the atoms of these elements?
Element X forms a chloride with the formula XCl2, which is a solid with a high melting point. X would most likely be in the same group of the Periodic Table as
State any three demerits of Mendeleev’s periodic table.
On what basis did mandeleev arrange the elements in his periodic table?
State Mendeleev's periodic law.
(a) Write its electronic configuration and determine its valency.
(b) Is it more reactive or less reactive than Ca (atomic number 20)? Justify your answer giving reason.
(c) Is it a metal or a non-metal?
(d) Write the formula of its oxide.
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 a short note.
Mendeleev’s periodic law.
Write the merits of Mendeleev’s periodic table.
Mendeleev's contributions to the concept of a periodic table laid the foundation for the Modern Periodic Table. Give reasons.
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.
How many elements were known at the time of Mendeleev's classification of elements?
Answer the following question:
Name two elements having a single electron in their outermost shell.
What are the demerits of Mendeleev’s periodic table?
How did Mendeleev arrange the elements in the periodic table?
State the contributions made by Mendeleev towards the periodic table.
Give a reason for the following:
Mendeleev's contributions to the periodic table laid the foundation for the Modern Periodic Table.
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.
Distinguish between:
Mendeleev’s periodic table - Modern periodic table
On which basis Mendeleev organised periodic law?
What physical and chemical properties of elements did Mendeleev consider in compiling the periodic table?
What are the limitations of Mendeleev's periodic table?
At the time of Mendeleev, the number of elements known was ______
The properties of eka-aluminum predicted by Mendeleev are the same as the properties of a later discovered elements: ______
An element has 12 protons. The group and period to which this element belongs is ______
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 ______
On moving from left to right in a period in the periodic table, the size of the atom.
