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प्रश्न
State any five features of modern periodic table.
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उत्तर
- All the elements are arranged in the increasing order of their atomic number
- The horizontal rows are called periods. There are seven periods in the periodic table.
- The elements are placed in periods based on the number of shells in their atoms
- Vertical columns in the periodic table starting from top to bottom are called groups. There are 18 groups in the periodic table
- Based on the physical and chemical properties of elements, they are grouped into various families.
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संबंधित प्रश्न
Which of the following statement about the modern periodic table is correct?
(a) It has 18 horizontal rows known as periods.
(b) It has 7 vertical columns known as periods.
(c) It has 18 vertical columns known as groups.
(d) It has 7 horizontal rows known as groups.
Consider the following elements:
Na, Ca, Al, K, Mg, Li
Which of these elements belong to the same period of the periodic table?
How many groups and periods does the modern periodic table have?
Name two elements in Alkali metals.
Name two elements in each case: Lanthanides
Give the symbol and valency of the following element and radical.
Aluminium
Give the chemical formula of sodium nitrate
Group 13 to 18 : p block : : _______ : d block
Find the odd one out and give its explanation.
Which of the following is the outermost shell for elements of period 2?
