Advertisements
Advertisements
प्रश्न
Write the molecular formula of the oxide of any one of the elements in Mendeleev’s periodic table.
उत्तर
Element | Molecular formula |
Na | Na2O |
Si | SiO2 |
Ca | CaO |
C | CO2 |
APPEARS IN
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 that have a single electron in their outermost shells.
Name two elements that have two electrons in their outermost shells.
Name three elements with filled outermost shells.
Helium is an unreactive gas and neon is a gas of extremely low reactivity. What, if anything, do their atoms have in common?
By considering their position in the Periodic Table, which one of the following elements would you expect to have maximum metallic characteristic?
Name the Russian chemist who said that the properties of elements are a periodic function of their atomic masses.
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.
Explain in brief how Mendel interpreted his results to show that the traits may be dominant or recessive.
Use Mendeleev's Periodic Table to predict the formula of hydrides of carbon and silicon.
Which group of elements was missing from Mendeleev's original periodic table?
Name an element whose properties were predicted on the basis of its position in Mendeleev's periodic table.
How did Mendeleev arrange the elements in the periodic table?
What was the basis of Mendeleev's classification?
Give a reason for the following:
Mendeleev's contributions to the periodic table laid the foundation for the Modern Periodic Table.
Beryllium : alkaline earth metal : : sodium: _______
Distinguish between:
Mendeleev’s periodic table - Modern periodic table
What physical and chemical properties of elements did Mendeleev consider in compiling the periodic table?
What challenges did Mendeleev face in following periodic law?
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: ______
Which of the following oxide is most basic?
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.
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.
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”?
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?