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प्रश्न
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?
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उत्तर
13Al, 14Si, 11Na, 12Mg, 16S
Electronic configuration of the following elements is:
13Al = 2,8,3
14Si = 2,8,4
11Na = 2,8,1
12Mg = 2,8,2
16S = 2,8,6
11Na has the highest metallic character because metallic character of an elements decreases as we move from left to right in a modern periodic table. This happens as the tendency of an atom to lose electrons decreases due to gradual increase in the number of protons and nuclear charge.
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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)
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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)
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Which among the following is the largest element?
Find the odd one out and give its explanation.
Write the name of noble gas having 2 electrons in its valence shell.
Write the name of an element having electronic configuration 2,8,2.
Match the columns.
| Column A | Column B |
| 1) Alkaline earth metals | a) Group 18 |
| 2) Alkali metals | b) Group 17 |
| 3) Halogen | c) Group 2 |
| 4) Noble gas | d) Group 1 |
| e) Group 14 |
Write the name.
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Write an Explanation.
Group
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- What is the atomic number of element A?
- Find the group to which this element belongs.
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- 2, 8, 2
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- 2, 1
Observe the periodic table given below and write the answers of the questions.
- Write the name and valencies of the elements in 3rd row.
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- Write name of any two metalloid elements.
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An element has its electron configuration as 2, 8, 1. Now answer the following questions:
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