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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
An element X belongs to 3rd period and group 2 of the periodic table. State:
(a) number of valence electrons
(b) valency
(c) metal or non-metal
(d) name of the element
What are horizontal rows and vertical columns in a periodic table known as?
Name two elements in halogens.
Fill in the blank:
The horizontal rows in the periodic table are called _____________.
Give the symbol and valency of the following element and radical.
Sodium
Which of these belong to the same period?
| Element | A | B | C |
| Atomic number | 2 | 10 | 5 |
Give the criteria on the basis of which elements are placed (i) in a group and (ii) in a period in the modern periodic table. The atomic number of an element is 16. According to the criteria, in which group and period it should be placed?
What is the general name of the last elements of the Periodic Table?
Name the following metal:
A metal present in period 3, group 1 of the periodic table.
An element has 2 electrons in its N shell.
State its position in periodic table.
