Looking at the picture, you can see there are two electrons in shell one and seven in shell two.  Applications of pure perfluorocarbon liquid breathing (which uses pure perfluorocarbon liquid, not a water emulsion) include assisting burn victims and premature babies with deficient lungs.  The composition of fluorite was later determined to be calcium difluoride. covalent compounds. The total number of neutrons in the nucleus of an atom is called the neutron number of the atom and is given the symbol N. Neutron number plus atomic number equals atomic mass number: N+Z=A. The major consumer application is for non-stick cookware. Surrounding the nucleus of fluorine is 9 electrons. The transition from β- to α-fluorine is more exothermic than the condensation of fluorine, and can be violent. 2. Atomic Mass 18,9984032 Learn more about the atomic mass. Record the number of each atom here: 1 Sodium and 1 Fluorine 4. 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Number of electrons in - Carbon - Nitrogen - Fluorine - Sodium - Silicon 1 See answer ttnnn ttnnn Answer: Carbon : 2,4. , Covalent bonding first comes to prominence in the tetrafluorides: those of zirconium, hafnium and several actinides are ionic with high melting points,[note 12] while those of titanium, vanadium, and niobium are polymeric, melting or decomposing at no more than 350 °C (660 °F). The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10-19 coulombs. It is able to attack glass, concrete, metals, organic matter.  The global market was estimated at just under $6 billion in 2011 and was predicted to grow by 6.5% per year up to 2016.  Alkaline earth difluorides possess strong ionic bonds but are insoluble in water, with the exception of beryllium difluoride, which also exhibits some covalent character and has a quartz-like structure. Sodium : 11. Fluorides, unlike other halides, are insoluble and do not occur in commercially favorable concentrations in saline waters. 2s2. The number of neutrons can vary between 5-22, but the only naturally occurring isotope of fluorine has 10 neutrons.  Fluorine is monoisotopic, so any mass differences between UF6 molecules are due to the presence of 235U or 238U, enabling uranium enrichment via gaseous diffusion or gas centrifuge. So, 9 electrons. b. ► … a. Upon reduction, the fluorine atom forms fluoride, which has 8 valence electrons, and is isoelectronic with a Noble Gas (which one?).. Why should I know how many electrons are in fluorine? The electrons arrange themselves in 3 orbits: In the first orbit, there are 2 electrons.  Other examples include terminally fluorinated fatty acids, fluoroacetone, and 2-fluorocitrate. China and Mexico are the major suppliers. Each electron is influenced by the electric fields produced by the positive nuclear charge and the other (Z – 1) negative electrons in the atom. The team was surprised to observe ultrafast (<100 fs) dissociation of the strong carbon–fluorine bonds in the PFASs on addition of extra electrons. The small size of the fluorine atom makes it possible to pack a relatively large number of fluorine atoms or ions around a given coordination centre (central atom) where it forms many stable complexes—for example, hexafluorosilicate (SiF 6) 2− and hexafluoroaluminate (AlF 6) 3−. What is the mass number of a fluorine atom with 8 neutrons? The atomic mass or relative isotopic mass refers to the mass of a single particle, and therefore is tied to a certain specific isotope of an element. Why are you asking this question even though you know the answer . It is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions.  Many of them are powerful sources of fluorine atoms, and industrial applications using chlorine trifluoride require precautions similar to those using fluorine. In general the spin endows them with angular momentum and with a magnetic moment; the first because of their mass, the second because all or part of their electric charge may be rotating with the mass.  Fluorapatite (Ca5(PO4)3F), which contains most of the world's fluoride, is an inadvertent source of fluoride as a byproduct of fertilizer production.