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Question
Name the element in period 3 which does not form oxide.
Solution
Argon
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| Element | Atomic number |
| A | 5 |
| B | 7 |
| C | 10 |
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|
Group 1 |
Group 2 |
Group 17 |
Group 18 |
|
|
|
|
D |
|
|
B |
C |
|
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A |
|
|
E |
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is it a metal or non-metal
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