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प्रश्न
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
विकल्प
Na
Mg
Al
Si
उत्तर
Mg
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संबंधित प्रश्न
Name two elements that have two electrons in their outermost shells.
Mendeleev's contributions to the concept of a periodic table laid the foundation for the Modern Periodic Table. Give reasons.
Answer the following question:
Name two elements having a single electron in their outermost shell.
What are the demerits of Mendeleev’s periodic table?
What were the defects and anomalies in Mendeleeff's Periodic Table and how are they resolved by Moseley?
Write scientific reason.
Mendeleev kept vacant places in the periodic table.
On which basis Mendeleev organised periodic law?
Which of the following oxide is most basic?
In Mendeléev’s Periodic Table, gaps were left for the elements to be discovered later. Which of the following elements found a place in the periodic table later
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”
