The number of protons in ¹⁸O is: MCQ with Answer and Explanation

Explanation:
LPG (Liquefied Petroleum Gas) is naturally odorless. To detect dangerous leaks, a strong-smelling sulfur compound called ethyl mercaptan (thioethanol, C2H5SH) is added to it. Its pungent, rotting-cabbage-like smell is easily detectable by the human nose even at very low concentrations.

Explanation:
The diagonal relationship occurs when elements in the second period resemble elements in the third period of the next group due to similar ionic sizes and charge-to-radius ratios (polarizing power). Li-Mg, Be-Al, and B-Si are all classic examples of this phenomenon.

Explanation:
Iodine sublimes on heating, converting to vapor, leaving sand behind. Iodine vapors can be condensed. Filtration cannot separate two solids; distillation for liquids.