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प्रश्न
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.
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उत्तर
Hydroxide of element [2, 8, 2] is Mg [OH], where Mg is the element.
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संबंधित प्रश्न
Name any two elements of group one and write their electronic configurations. What similarity do you observe in their electronic configurations? Write the formula of oxide of any of the aforesaid elements.
Write the number of vertical columns in the modern periodic table. What are these columns called?
Which element has twice as many electrons in its second shell as in its first shell?
The metal of Group 2 from top to bottom arc Be, Mg, Ca, Sr, and Ba.
1) Which one of these elements will form ions most readily and why?
2) State the common feature in the electronic configuration of all these elements.
How does the valency of elements change of moving from left to right in the third period of the periodic table?
Why fluorine has higher E.N. than chorine?
What is the common feature of the electronic configuration of the elements at the end of period 2, and period 3?
What will be the valency of an element of atomic number 9 (nine)?
The position of elements A, B, C, D and E in the periodic table are shown below:
|
Group 1 |
Group 2 |
Group 17 |
Group 18 |
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|
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|
D |
|
|
B |
C |
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|
A |
|
|
E |
Which is larger in size (i) D or E (ii) B or C
The electronic configuration of an element is 2, 8, 4. State it:
group and period in the Modern Periodic Table.
