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प्रश्न
Name two elements that you would expect to show chemical reactions similar to calcium. What is the basis of your choice?
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उत्तर
Two elements, magnesium (Mg) and barium (Ba), undergo chemical reactions that are comparable to those of calcium because all three elements have two electrons in their outermost shell and are members of group II-A.
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संबंधित प्रश्न
Name the scientist who first of all showed that atomic number of an element is a more fundamental property than its atomic mass.
State how the valency of elements varies in a period of the periodic table?
In the modern Periodic Table, why does cobalt with higher atomic mass of 58.93 appear before nickel having lower atomic mass of 58.71?
What are the advantages of the periodic table?
Consider the following elements:
20Ca, 8O, 18Ar, 16S, 4Be, 2He
Which of the above elements would you expect to be:
(i) very stable?
(ii) in group 2 of the periodic table?
(iii) in group 16 of the periodic table?
State the number of elements in Period 1 of the Periodic Table.
Find the odd one out and give its explanation.
Right or wrong sentence.
The modern periodic table shows the molecular masses of the elements in each frame.
Right or wrong sentence.
To the left of the zig-zag line in the periodic table are the metal elements.
Match the atomic number with the following:
A rare gas.
