Question
Define :Low Earth Orbits
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| Column I | Column II |
| (1) s-block elements | (a) Lanthanides and actinides |
| (2) p-block elements | (b) Groups 1, 2 |
| (3) d-block elements | (c) Groups IIIA to VIIA and zero group |
| (4) f-block elements | (d) Groups 3 to 12 |
| (e) Zero group elements | |
| (f) Groups 13 to 18 |