All atoms contain neutrons in their nuclei except:

Protium

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Helium

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Neon

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Chlorine

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Solution

The correct option is A Protium
All atoms except Protium, an isotope of Hydrogen contain neutrons in their nuclei. As Protium has zero neutrons in the nucleus and has mass no 1.

Hence, the correct option is $A$

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Similar questions

Fill the blanks:

(a) According to the atomic model of ……………. electrons are embedded in a gel of positive charge.

(b) All atoms except …………….. contain neutrons in their nuclei.

(d) The atom of sodium has …………….. electrons in the outermost shell.

(H^{3})

............. contain same number of neutrons in their atoms.

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