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प्रश्न
Moving left to right in the second period, the number of valence electrons _____.
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उत्तर
Moving left to right in the second period, the number of valence electrons increases from 1 to 8.
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संबंधित प्रश्न
How do the valency and the atomic size of the elements vary while going from left to right along a period in the modern periodic table?
In which part of a group would you separately expect the elements to have the largest atomic size?
The element which has the maximum number of valence electrons is:
(a) Na
(b) P
(c) Si
(d) A
In each of the following pair, choose the atom having the bigger size:
Na (At. No. 11) or K (At. No. 19)
How does the number of:
valence electrons and
Fill in the blank
Most electropositive elements belong to ______ group.
Explain
Size of atom changes when it loses or gain electron
What is meant by a group in the periodic table?
An element A has 2 electrons in its fourth shell. State:
its valency
Write the electronic configuration of two elements A and B whose atomic numbers are 20 and 17 respectively. Write the molecular formula of the compound formed when element A reacts with element B. State whether this compound is acidic, basic or neutral. Give a reason to justify your answer.
