The noble gases are 1 Monoatomic colourless and odourless 2 Diatomic colourless and odourless 3 Have...........

Geography Atmosphere

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The noble gases are

1. Monoatomic, colourless and odourless

2. Diatomic, colourless and odourless

3. Have very low chemical reactivity

Select the correct answer using the codes given below

1, 2 and 3

1 and 3

3 Only

2 and 3

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Explanation:

Second statement is incorrect i.e. The noble gases are diatomic, colourless and odourless.
The noble gases are the chemical elements in group 18 of the periodic table.
They are the most stable due to having the maximum number of valence electrons their outer shell can hold. Other characteristics of the noble gases are that they all conduct electricity, fluoresce, are odorless and colorless, and are used in many conditions when a stable element is needed to maintain a safe and constant environment.