Definition of chemical elements

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SUMMARY

Oxygen is classified as a chemical element, represented by the symbol 'O' on the periodic table. While oxygen gas (O2) consists of two oxygen atoms bonded together, it is more accurately described as a molecule rather than an element. The periodic table specifically refers to the oxygen atom, which is the fundamental unit of the element. Understanding this distinction is crucial for grasping the definitions and classifications within chemistry.

PREREQUISITES
  • Understanding of the periodic table and element symbols
  • Basic knowledge of atomic structure and molecular formation
  • Familiarity with chemical terminology, including elements and molecules
  • Concept of atomic number (Z) and its significance in element classification
NEXT STEPS
  • Research the differences between elements and compounds in chemistry
  • Study the structure and properties of diatomic molecules, focusing on O2
  • Explore the significance of atomic number (Z) in the periodic table
  • Learn about the role of oxygen in various chemical reactions and processes
USEFUL FOR

Students of chemistry, educators teaching chemical concepts, and anyone interested in the fundamental definitions of chemical elements and their classifications.

Leong
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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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