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प्रश्न
While designing the periodic table, Mendeleev considered the chemical and physical properties of the elements.
पर्याय
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उत्तर
While designing the periodic table, Mendeleev considered the chemical and physical properties of the elements- Right
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संबंधित प्रश्न
What are the main features of Mendeleev’s periodic table?
Name three elements that have a single electron in their outermost shells.
Name three elements with filled outermost shells.
On what basis elements are arranged in periodi table now?
On what basis did mandeleev arrange the elements in his periodic table?
What chemical properties of elements were used by Mendeleev in creating his periodic table?
(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.
According to Mendeleev’s periodic law, properties of elements are periodic function of their _______.
In Mendeleev’s periodic table eka- silicon was later named as _______.
Beryllium : alkaline earth metal : : sodium: _______
According to Mendeleev’s periodic law properties of elements are ______.
Write scientific reason.
Mendeleev kept vacant places in the periodic table.
What physical and chemical properties of elements did Mendeleev consider in compiling the periodic table?
At the time of Mendeleev, the number of elements known was ______
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 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 ______
Properties of the elements are given below. Where would you locate the following elements in the periodic table?
- A soft metal stored under kerosene
- An element with variable (more than one) valency stored under water.
- An element which is tetravalent and forms the basis of organic chemistry
- An element which is an inert gas with atomic number 2
- An element whose thin oxide layer is used to make other elements corrosion resistant by the process of “ anodising”
Mendeléev predicted the existence of certain elements not known at that time and named two of them as Eka-silicon and Eka-aluminium.
- Name the elements which have taken the place of these elements
- Mention the group and the period of these elements in the Modern Periodic Table.
- Classify these elements as metals, non-metals or metalloids
- How many valence electrons are present in each one of them?
Which group of elements could be placed in Mendeléev's Periodic Table without disturbing the original order? Give reason.
Give an account of the process adopted by Mendeléev for the classification of elements. How did he arrive at “Periodic Law”?
State Mendeleev’s Law of Periodicity.
List the features of Mendeleev’s Periodic Table.
Name the elements whose compounds formed the basis of classification in Mendeleev's periodic table. Why did Mendeleev choose these elements?
How the formulae of these compounds had helped Mendeleev in deciding the position of an element in his periodic table?
