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प्रश्न
What do you understand by orbits?
उत्तर
Electrons revolve around the nucleus in certain definite circular paths called orbits or shells.
संबंधित प्रश्न
Which element has a total of two shells, with three electrons in its valence shell?
What happens to the metallic character of the elements as we go down in a group of the periodic table?
Which of the following element does not lose an electron easily?
(a) Na
(b) F
(c) Mg
(d) Al
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?
How many groups and periods are there in the modern periodic table?
Explain, the statement 'In each period, the atomic radii gradually decrease with increase in atomic number'. Give one example to justify your answer.
How could the atomic radius of a noble gas be compared with the other elements in a period?
Select the correct answer
Most reactive character among the elements given below is found in
The position of certain elements in the Modern Periodic Table is shown below:
Using the above table answer the following questions giving reasons in each case :
(i) Which element will form only covalent compounds?
(ii) Which element is a non-metal with valency 2?
(iii) Which element is a metal with valency 2?
(iv) Out of H, C, and F which has the largest atomic size?
(v) To which family does H, C, and F belong?
Name or state following with reference to the element of the first three periods of the periodic table.
A non-metal in period 2 having electronic configuration 2, 6.
