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प्रश्न
Name or state following with reference to the element of the first three periods of the periodic table.
The valency of the element in period 3 having atomic number 17.
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उत्तर
Valency is 1 negative [−1]
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संबंधित प्रश्न
List any two properties of the elements belonging to the first group of the modern periodic table.
Differentiate between Normal elements and Transition elements.
Name two elements you would expect to show chemical reactions similar to calcium. What is the basis of your choice?
How does the number of:
valency vary on moving from left to right in the second period of the periodic table?
Atomic number of metal ‚A‛ is 11, while atomic number of metal ‚B‛ is 20. Which of them will be more reactive? Write the chemical reaction of dilute HCl with metal ‚A‛.
What is the common feature of electronic configurations of the elements at the end of period 2 and period 3?
Name and state the following with reference to the elements of the first three periods of the periodic table.
Alkaline earth metal in period 3.
The electronic configuration of an element is 2, 8, 4. State it:
name and write its one physical property.
Based on the group valency of element write the molecular formula of the following compound giving justification:
Oxide of first group elements.
Which of the following would weigh the least?
(Atomic masses C = 12, 0 = 16, Na = 23)
