Water is the only common substance that is naturally found as a solid, liquid or gas.

The halogens

Examples of liquids include water and oil. Gases may liquefy when they cool, as is the case with water vapor. This occurs as the molecules in the gas slow down and lose energy. Solids may liquefy when they heat up; molten lava is an example of solid rock which has liquefied as a result of intense heat.

Answer. A period 2 element is one of the chemical elements in the second row The second period contains the elements lithium, beryllium, boron, carbon, nitrogen, oxygen, It burns hydrogen simultaneously if either is liquid or gaseous—even at …

carbon group

Fluorine is a pale yellow or light green gas with a sharp, penetrating odor. It is the most chemically reactive of all the gases and the most electronegative of all the elements. Fluorine is available in both gas and liquid forms.

* Breathing Fluorine can irritate the nose and throat. * Breathing Fluorine can irritate the lungs causing coughing and/or shortness of breath. Higher exposures can cause a build-up of fluid in the lungs (pulmonary edema), a medical emergency, with severe shortness of breath.

Silicon is much more abundant than any other element, apart from the Oxygen. The Atomic Number of this element is 14 and the Element Symbol is Si. Elements can be classified based on their physical states (States of Matter) e.g. gas, solid or liquid. This element is a solid.

At room temperature, fluorine is a gas of diatomic molecules, pale yellow when pure (sometimes described as yellow-green). It has a characteristic halogen-like pungent and biting odor detectable at 20 ppb.

Fluorine is usually a pale yellow gas. It has a pungent odor.

Fluorine never seems to run out of ways to kill researchers. It tends to form acids easily, which means it eats through whatever early chemists used to contain it. Once it’s out, it is poisonous all on its own, but it can combine with other elements to form other poisonous chemicals.

What is Fluorine? Elements can be classified based on their physical states (States of Matter) e.g. gas, solid or liquid. This element is a gas. Fluorine is classified as an element in the ‘Halogens’ section which can be located in group 7 of the Periodic Table.

Sodium fluoride (NaF), stannous(II) fluoride (SnF2) and sodium monofluorophosphate (Na2PO3F) are all fluorine compounds added to toothpaste, also to help prevent tooth decay. Fluorine joins with carbon to form a class of compounds known as fluorocarbons.

earth’s crust

The nearly anhydrous acid was prepared in 1809, and two years later the French physicist André-Marie Ampère suggested that it was a compound of hydrogen with an unknown element, analogous to chlorine, for which he suggested the name fluorine. Fluorspar was then recognized to be calcium fluoride.

Sources of Fluoride

The name fluorine is derived from the mineral fluorite which comes from the Latin word “fluere” meaning “to flow.” The name was suggested by English chemist Sir Humphry Davy. Fluorine has one stable isotope, fluorine-19. It is the only form that fluorine occurs in naturally.

It is also used to make sulfur hexafluoride, the insulating gas for high-power electricity transformers. In fact, fluorine is used in many fluorochemicals, including solvents and high-temperature plastics, such as Teflon (poly(tetrafluoroethene), PTFE).

Note: Fluorine is in Group 7 (sometimes called Group VII or Group 17). Since it is in Group 7 it will have 7 valence electrons. When you draw the Lewis structure for Fluorine you’ll put seven “dots” or valance electrons around the element symbol (F).

U

From a chemical point of view, uranium is a heavy metal and about as toxic as lead. Touching it won’t really do anything to you. Ingesting or inhaling it would be bad, but as long as you don’t have any cuts on your hands and wash them when you’re done you’re unlikely to have any problems.

Uranium is also used by the military to power nuclear submarines and in nuclear weapons. Depleted uranium is uranium that has much less uranium-235 than natural uranium. It is considerably less radioactive than natural uranium. It is a dense metal that can be used as ballast for ships and counterweights for aircraft.

A small amount of uranium will stay in your bones anywhere from months to years after ingestion, but eating uranium is much less toxic than inhaling it. You might not be surprised to learn that eating large doses of a radioactive substance leads to an increased chance of developing a cancer.

Originally Answered: What would happen if I ate 1 gram of uranium? In the short term, probably nothing. Only about 0.5% of ingested uranium is absorbed by the body.

Because uranium decays by alpha particles, external exposure to uranium is not as dangerous as exposure to other radioactive elements because the skin will block the alpha particles. Ingestion of high concentrations of uranium, however, can cause severe health effects, such as cancer of the bone or liver.

There is no health hazard from touching plutonium. Just wash your hands afterward so that any traces of it don’t accidentally get inside you. It presents zero risk outside of the body. Plutonium is only a hazard if it gets inside you in large quantities: inhaled, ingested, or absorbed.

Is it a metal like uranium? A: Plutonium is, in fact, a metal very like uranium. If you hold it [in] your hand (and I’ve held tons of it my hand, a pound or two at a time), it’s heavy, like lead. It’s toxic, like lead or arsenic, but not much more so.

You can support Foreign Policy by becoming a subscriber. 5 grams of plutonium to die immediately, compared to about . 1 grams of cyanide. The plutonium at Fukushima isn’t in the air, but inhaling about 20 milligrams of plutonium would probably kill you within a few months. External exposure carries almost no risk.