Definition of chemical elements

AI Thread Summary
Oxygen is classified as a chemical element, with its representation on the periodic table referring specifically to oxygen atoms. Oxygen gas (O2) is a molecule composed of two oxygen atoms, distinguishing it from the elemental form. The discussion emphasizes the importance of understanding the definitions of chemical elements and molecules. Clarification is provided that while oxygen is an element, the term "oxygen gas" pertains to its molecular form. Understanding these distinctions is crucial for grasping fundamental chemistry concepts.
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Is oxygen gas a chemical element?
Is oxygen atom a chemical element?
The oxygen element in the periodic table actually refers to an oxygen atom or oxygen gas that exist naturally in our surrounding air/atmosphere?
Thanks to anyone that help and try to explain.
 
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Ntzntz,conceptual quaestions...:rolleyes: Open your textbook & read the definition of a chemical element.See which option for O_{2} fits the definition.

For the III-rd,u might remember the connection between Z,the element & the place in the periodic table.

Daniel.
 
Oxygen in general is an element, oxygen gas is better referred to as a molecule. The oxygen mentioned on the periodic table refers to atom(s) of the element...
 

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