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प्रश्न
Write the name.
The group of elements having electronic configuration 2, 2.
उत्तर
The group of elements having electronic configuration 2, 2- Group 2
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संबंधित प्रश्न
An element has its electron configuration as 2, 8, 2. Now answer the following question.
a. What is the atomic number of this element?
b. What is the group of this element?
c. To which period does this element belong?
d. With which of the following elements would this element resemble? (Atomic numbers are given in the brackets)
N(7), Be(4), Ar(18), Cl(17)
Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation.
4Be, 6C, 8O, 5B, 13Al Which is the most electropositive element among these?
Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation.
11Na, 15P, 17Cl, 14Si, 12Mg Which of these has largest atoms?
Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with an explanation.
13Al, 14Si, 11Na, 12Mg, 16S
Which of the above elements has the highest metallic character?
Which of this element belong to the period 3? Write their electronic configuration
`3^(Li) , 14^(Si) , 2^(He) , 15^(P)`
An element has its electron configuration as 2, 8, 2. Now answer the following question.
What is the atomic number of this element?
An element has its electron configuration as 2, 8, 2. Now answer the following question.
With which of the following elements would this element resemble?
(Atomic numbers are given in the brackets)
N(7), Be(4), Ar(18), Cl(17)
_______ is the outermost shell for elements of period 2.
Which pair of atomic numbers represents elements in the same group?
Find the odd one out and give its explanation.
Write the name of noble gas having 2 electrons in its valence shell.
The number of electrons in the outermost shell of an atom determines the _______.
Write the name.
The element having stable electron configuration from the third period.
The valency of the elements in group 2 is 1.
The number of shells decreases in a group from top to bottom.
Write scientific reason.
Boron and oxygen elements are placed in the second period in periodic table.
Complete the following chart.
| Shell | n | 2n2 | Electron holding capacity |
| K | ______ | 2 × 12 | 2 |
| L | 2 | ______ | 8 |
| ______ | 3 | 2 × 32 | 18 |
| N | 4 | 2 × 42 | ______ |
Write name of elements, symbol, atomic number, electronic configuration of second period in modern periodic table?
Identify periods of elements and blocks of elements from given electronic configuration?
- 2, 8, 2
- 2, 8, 7
- 2, 1
What is the electronic configuration of K19?
