PDF chapter test TRY NOW
Answer the following questions using the data given below:
1.
| Assertion: | Xenon element present in the fifth period of the periodic table. |
| Reason: | Because it has atomic number fifty four. |
2.
| Assertion: | Oganesson element present in the seventh period of the periodic table. |
| Reason: | Because it has atomic number one hundred eighteen. |
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