Chemistry · s, p, d and f block elements

Elements with atomic numbers 9,17,35 53 are collectively known as:

Elements with atomic numbers 9,17,35 53 are collectively known as:

  • A. chalcogens
  • B. halogens
  • C. lanthanides
  • D. rare gases

Step-by-step solution

Atomic numbers 9 (fluorine), 17 (chlorine), 35 (bromine), and 53 (iodine) are all elements in Group 17 of the periodic table, which are collectively known as halogens.
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