In the periodic table, the highly electronegative halogens and the highly electropositive alkali metals are separated by:
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. Noble gases
- Rare Earth Elements (Metals) are found in the periodic table's d-block and f-block.
- There are 17 Rare Earth Elements in all, 15 of which are Lanthanides and the remaining two from the d-block, Scandium (Sc) and Yttrium (Y).
- To complete their octet, very negative halogens just need one electron.
- Noble gases are those with a complex octet.
- Alkali metals only have one excess electron in their outermost element, which they wish to relinquish in order to achieve a full octet.
- As a result, noble gases separate halogen and alkali metals.