Question

At STP, oxygen exists in two forms, O2(g) and O3(g). These two forms of oxygen have 1. different molecular structures and different properties 2. different molecular structures and the same properties 3. the same molecular structure and different properties 4. the same molecular structure and the same properties

Answer 1

At STP, oxygen exists in two forms, O2(g) and O3(g). These two forms of oxygen have different molecular structures and different properties. The answer is number 1. The rest of the numbers do not answer the question above.

Answer 2

Answer: option 1. different molecular structures and different properties.

Explanation:

1) O₂ and O₃ are different forms of the same element, in the same physical state (gaseous).

2) That is what is called allotropes.

3) The definition of allotropes is different forms of an element with different structures and different properties in the same physical state.

Graphite and diamond is other example of common allotropes.

4) O₃ and O₂ have the same kind of atoms (oxygen), but they are bonded differently (different structure, one molecule has 3 atoms, other 2 atoms) which conferes them different properties (e.g. different odor, different chemical reactivity).