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प्रश्न
Moving down in the second group, number of valence electrons ______.
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उत्तर
Moving down in the second group, the number of valence electrons remains the same.
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संबंधित प्रश्न
Write the number of periods the Modern Periodic Table has. State the changes in valency and metallic character of elements as we move from left to right in a period. Also state the changes, if any, in the valency and atomic size of elements as we move down a group.
List any two properties of the elements belonging to the first group of the modern periodic table.
Name the element which is in first group and third period.
Study the extract of the Periodic Table given below and answer the questions that follow. Give the alphabet corresponding to the element in question. DO NOT repeat an element. 
The ion of which element will migrate towards the cathode during electrolysis?
Arrange the following in increasing order of property indicated
SiO2, P2O5, SO3, Cl2O7 (acidic nature)
Explain, the statement 'In each period, the atomic radii gradually decrease with increase in atomic number'. Give one example to justify your answer.
Arrange the following as per instruction given in the bracket.
Cs, Na, Li, K, Rb (increasing metallic character)
Going across a period left to right, atomic size _____.
State the property trends in general of elements on moving down in a group of the periodic table.
Select the correct answer from the options given below.
It is a period having elements from atomic no. 11 to 18.
