RRB Junior Engineer / DMS / CMA 2019 · Question 68 of 3719
Chemistry - Atomic Structure
The elements which exist as single atom are called monoatomic elements. The elements which exist in atomic pairs bonded to each other are called diatomic elements. The elements which exist as groups of more than two atoms are called polyatomic elements. Chlorine (Cl2), Nitrogen (N2) and Hydrogen (H2) are diatomic gases. But sulphur exists as S8 and hence it is polyatomic. Selenium (Se8), Ozone (O3) and Phosphorous (P4) some other polyatomic elements.
Source: RRB JE 2019 CBT-1 (24-May-2019 Shift-2) — ixambee compilation with answer key and solutions · reliable-secondary
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