Question

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4 The properties of water are different from its constituent elements hydrogen and oxygen
5 We don’t find any compounds of noble elements in nature.

Answer 1

4--The characteristic properties of theseelements are different from those ofwater. However, hydrogen and oxygenhave some common properties. They are both colorless, odorless gases , and they both readily react with other elements—making them "reactive"elements.

5--The list includes helium, neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). Don't think that, because these elements don't like to react, we don't use them. You will find noble gases all over our world. ... Theyare not just rare in nature, but rare as useful elements, too.