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प्रश्न
How do atomic structures (electron arrangements) change in a period with increase in atomic numbers from left to right?
उत्तर
As the atomic number increases from left to right in a periodic table, the size of the atom decreases.
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संबंधित प्रश्न
Match the atomic number 2, 4, 8, 15 and 19 with each of the following
1) A solid non metal belonging to the third period.
2) A metal of valency 1.
3) A gaseous element with valency 2.
4) An element belonging to Group 2
5) A rare gas.
Calculate the mass of Calcium that will contain the same number of the atom as are present in 3.2 gm of Sulphur.
[Atomic masses: S=32, Ca=40]
How does the number of valence electrons vary on moving from left or right in the second period of the periodic table?
Name the element of lower nuclear charge out of Be and Mg.
How many elements are there in period 2?
The following questions refer to the Periodic Table.
What is the common feature of the electronic configurations of the elements in group 7?
Arrange the following in order of increasing radii:
Mg2+, Mg, Mg+
An element A has 2 electrons in its fourth shell. State:
its valency
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.
The formula of the hydroxide of the element having electronic configuration 2, 8, 2.
