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प्रश्न
Find the odd one out and give its explanation.
पर्याय
Beryllium
Magnesium
Carbon
Oxygen
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उत्तर
Magnesium
Explanation:
Magnesium is placed in period 3, while others are placed in period 2 of the modern periodic table.
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संबंधित प्रश्न
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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)
N(7), Be(4), Ar(18), Cl(17)
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Answer the following question in one sentence.
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Answer the following question in one sentence.
Write the name of an element having electronic configuration 2,8,2.
Match the columns.
| Column A Electronic configuration |
Column B Valency |
| 1) 2, 2 | a) 1 |
| 2) 2, 8, 1 | b) 2 |
| 3) 2, 5 | c) 3 |
| d) 5 |
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Write the name.
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Right or wrong sentence.
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Right or wrong sentence.
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