Origin of Name From the Latin word fluo, meaning flow Date and Place of Discovery 1886 in France Discovered by Joseph Henri Moissan Common Compounds Sodium fluoride (NaF) Interesting facts
- It is a yellow gas at room temperature.
- It's the 13th most abundant element found in the earth's crust.
- It isn't a free element in nature.
- It is very reactive with other elements and can combine with almost any element.
- The last United States mine to produce fluorine closed in 1995 making it necessary to import fluorine minerals.
- Water treatment to prevent tooth decay
- Toothpaste and other dental products
- Refrigerants
- Air-conditioning
- Teflon
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Related Question
The mass number of a neutral atom is 19 , and its atomic number is 9 . The atom contains how many protons, electrons, and neutrons?
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Video Transcript
We are told that the mass number of an element is 19. The atomic number is nine. So this contains how many protons and this is a neutral atom, How many electrons and how many neutrons? I should write these protons, electrons, neutrons. Well, the atomic number is the number of protons. And since this is neutral, it's also a number of electrons and mask number minus atomic number equals the number of neutrons, So 19-9 equals 10 neutrons, nine Protons, 10 electrons. And if you're wondering, this would be flooring, Which is # nine on the periodic table.
This isotope of fluorine has 9 protons, 9 electrons and 10 neutrons.
The atomic number is the number of protons #("p"^+")#. In a neutral atom, the number of electrons #("e"^(-)")# equals the number of protons. Mass number is the sum of the protons and neutrons #("n"^0")# of a particular isotope. If you have mass number and atomic number, subtract the atomic number from the mass number to get the number of neutrons. #("Mass number") - ("atomic number")="number of neutrons"#.
There are:
9 protons
9 electrons
10 neutrons
Fluorine is the element in question, as its atomic number is #9#. You would name this particular isotope using the mass number. It would be called fluorine-19.
The nuclear or isotopic notation would be #""_9^19"F"#.
How many neutrons are in fluorine 9?
Name | Fluorine |
Atomic Number | 9 |
Atomic Mass | 18.998 atomic mass units |
Number of Protons | 9 |
Number of Neutrons | 10 |