c. eight protons in its nucleus. Isotopes are named for their mass numbers. Oxygen’s atomic number is 8. For example, if an atom has 9 protons, it will no longer be oxygen, but will instead be Fluorine. Oxygen is a chemical element with symbol O and atomic number 8. Oxygen is significant in a number of industries that use kilns. Liquid oxygen, when combined with liquid hydrogen , makes an excellent rocket fuel. Electron configuration is the electron arrangement in an atom. CAS number If the number of electrons in an atom varies, the element remains the same, but new ions are produced. The atomic number is the smaller of the two numbers in the symbol. Where more than one isotope exists, the value given is the abundance weighted average. Ozone (O 3 ) forms a thin, protective layer around the earth that shields the … Oxygen has an atomic number of 8. b. a total of eight protons and neutrons. Oxygen is the element with atomic number 8 and element symbol O. This is approximately the sum of the number of protons and neutrons in the nucleus. Mass number (A) is the sum of the atomic number(Z), which is the number of protons, and neutrons (N) in the nucleus of a specific isotope of an element (A=Z+N). Isotopes Atoms of the same element with different numbers of neutrons. So for an atom to be known as an oxygen atom, it must have 8 protons. It is a member of the chalcogen group on the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds. d. … Atomic Number (number of protons in the nucleus): 8; Atomic Symbol (on the Periodic Table of Elements): O; Atomic Weight (average mass of … Under ordinary conditions, it can exist as a pure element in the form of oxygen gas (O 2) and also ozone (O 3).Here is a collection of facts about this essential element. Terms Related To Atomic Number . Oxygen has three stable isotopes, and 14 unstable ones. Relative atomic mass The mass of an atom relative to that of carbon-12. This means that an oxygen atom has a. eight neutrons in its nucleus. It is typically located as a subscript to the left of the element symbol. Element = oxygen Atomic number of oxygen = 8 As we know that the atomic mass of oxygen = 16 amu So, the approximate atomic mass of an oxygen atom in daltons (Da) = Atomic mass unit of oxygen = 16 amu = 16 Da Thus, the approximate atomic mass of an oxygen atom daltons (Da) is, 16 Da Out of the six known chalcogens, one (oxygen) has an atomic number equal to a nuclear magic number, which means that their atomic nuclei tend to have increased stability towards radioactive decay. The intense reactivity of ozone is sometimes explained by suggesting that one of the three oxygen atoms is in an “atomic” state; on reacting, this atom is dissociated from the O 3 molecule, leaving molecular oxygen. Sulfur … Classified as a nonmetal, Oxygen is a gas at room temperature. Oxygen is a colourless, odourless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air. Argon is mostly used as an inert shielding gas in welding and other high-temperature industrial processes where ordinarily unreactive substances become reactive; for example, an argon atmosphere is used in graphite electric furnaces to prevent the graphite from burning. Oxygen can also be combined with acetylene (C 2 H 2) to produce an extremely hot flame used for welding.

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