Which of these is not a property of hydrogen

To determine which of these options is not a property of hydrogen, we first need to identify the properties of hydrogen.

Hydrogen is a chemical element with the symbol "H" and atomic number 1. Here are some of its properties:

1. Colorless and odorless: Hydrogen gas (H₂) is invisible and does not have a distinct smell.
2. Highly flammable: Hydrogen is a highly reactive gas and can burn when ignited.
3. Low density: Hydrogen gas is less dense than air, which is why it tends to rise.
4. Good conductor of electricity: Hydrogen gas can conduct electricity when ionized.
5. Combines with other elements easily: Hydrogen is a versatile element that readily forms compounds with various elements.

Now, let's examine the given options to find the one that is not a property of hydrogen. Could you please provide the options?