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Questions
An element has its electron configuration as 2, 8, 2. Now answer the following question.
What is the atomic number of this element?
The electronic configuration of an element is 2, 8, 2. Then write the answer to the question given below.
What is the atomic number of this element?
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Solution
The atomic number of this element is 12.
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An element has its electron configuration as 2, 8, 2. Now answer the following question.
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(Atomic numbers are given in the brackets)
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| Column A | Column B |
| 1) s -block | a) Lanthanides and actinides |
| 2) p -block | b) Group 3 to 12 |
| 3) d -block | c) Group 1, 2 |
| 4) f -block | d) Group 13 to 18 |
| e) Zero group |
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| Column A Electronic configuration |
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| 1) 2, 2 | a) 1 |
| 2) 2, 8, 1 | b) 2 |
| 3) 2, 5 | c) 3 |
| d) 5 |
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 |
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