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प्रश्न
Name and state the following with reference to the elements of the first three periods of the periodic table.
Alkaline earth metal in period 3.
उत्तर
Magnesium
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संबंधित प्रश्न
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.
Fill in the blank in the following statement:
On moving form right to left in the second period, the number of valency electrons ...............
The electronic configuration of the atom of an element X is 2, 8, 4. In modern periodic table, the element X is places in :
(a) 2nd group
(b) 4th group
(c) 14th group
(d) 8th group
An element X belong to 3rd periods and group II of the periodic table state:
name of the element,
Complete the following sentences
The similarities in the properties of a group of elements are because they have the same …………………
What is the common feature of electronic configurations of the elements at the end of period 2 and period 3?
Arrange the following as per instruction given in the bracket
Na, K, Cl, S, Si (increasing ionisation potential)
An element A has 2 electrons in its fourth shell. State:
is it an oxidising or reducing agent
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.
Select the correct answer from the options given below.
Is the group number of the element whose atomic number is 4.
