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प्रश्न
The elements of one short period of the periodic table are given below in order from left to right:
| Li | Be | B | C | O | F | Ne |
To which period do these elements belong?
उत्तर
The elements belong to Second Period.
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संबंधित प्रश्न
An element 'X' has mass number 35 and number of neutrons 18. Write atomic number and electronic configuration of 'X'. Also write group number, period number and valency of 'X'.
The following table shows the electronic configuration of the elements W, X, Y, Z:
| Element | w | x | y | z |
| Electronic configurations |
2, 8, 1 | 2, 8, 7 | 2, 5 | 1 |
Answer the following questions based on the table above:
1) What type of Bond is formed between :
a) W and X
b) Y and Z
2) What is the formula of the compound formed between :
a) X and Z
b) W and X
Given alongside is a part of the periodic table. As we move vertically downward from Li to fr?
| Li | Be |
| Na | |
| K | |
| Rb | |
| Cs | |
| Fr | |
| rA | Ra |
What happens to the size of atoms?
Name the element of lower nuclear charge out of Be and Mg.
State whether the following statement is true or false
On moving horizontally across a period, number of valence electrons increases from one to eight.
Select the correct answer
Number of shells in potassium are
Select the correct answer
Most reactive character among the elements given below is found in
How many elements are there in period 2?
Name or state following with reference to the element of the first three periods of the periodic table.
The valency of elements in group 1 [I–A].
