Oxygen (O). Diagram of the nuclear composition,electron configuration,chemical data,and valence orbitals of an atom of oxygen-16 (atomic number: 8),the most common isotope of the element oxygen. The nucleus consists of 8 protons (red) and 8 neutrons (orange). Eight electrons (white) occupy available electron shells (rings). The stability of an element's outer (valence) electrons determines its chemical and physical properties. Oxygen,vital for life on Earth,is a non-metal in group 16,period 2,and the p-block of the periodic table. As a gas (O2) it forms 20 percent of the atmosphere. It liquefies at minus 219 degrees Celsius | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Clarivan, Carlos |
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