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How many elements occur natural?
Elements 1-92 except 43 (technetium) and 61 (promethium) occur naturally. So, there are 90 naturally occurring elements.
Where does chlorine naturally occur?
Chlorine gas does not occur naturally as it is too reactive. Chloride salts occur naturally. The most common is sodium chloride, NaCl. Chlorine, Cl2, is obtained by electrolysing molten NaCl.
In which form do many minerals occur naturally on the Earth?
Rocks
What are Lanthanides and Actinides?
Elements. The Lanthanides are: Atomic No.575859606162636465666768697071NameLaCePrNdPmSmEuGdTbDyHoErTmYbLu The Actinides are:Atomic No.8990919293949596979899100101102103NameAcThPaUNpPuAmCmBkCfEsFmMdNoLr
All of the actinides are?
radioactive elements that belong to the periodic table group of actinides. They have increasing atomic numbers starting from actinium (Z=89) to lawrencium (Z=103). Actinides are often used in nuclear reactors and are known for their radioactive properties.
Are most of the actinides occur naturally in earth's crust?
No, most of the actinides do not occur naturally in Earth's crust. Actinides are a group of elements that are mostly synthetic or man-made through nuclear reactions. Only a few actinides, like uranium and thorium, occur naturally in significant quantities in the Earth's crust.
Most of the actinides occur naturally in the earths crust?
no they do not
Do most actinides occur naturally in the earth's crust?
Yes
What are two elements that occur naturally in the ground?
gold and silver
What is the classification of nobelium?
Nobelium is classified as a synthetic element and a member of the actinide series on the periodic table. It is a radioactive metal that does not occur naturally and is typically produced in nuclear reactors or particle accelerators.
What are the two actinides that are used as nuclear fuel?
Both uranium and plutonium are actinides that are used as nuclear fuel.
What is the major difference between lanthanides and actinides?
Generally speaking, the lanthanides are naturally occurring and stable, although relatively uncommon. The actinides are naturally occurring through uranium; after that, they're synthetic, and all are unstable (radioactive.)
Which chemicals occur naturally in the air?
I wouldn't say that many chemicals occur naturally in the air, however Oxygen and Nitrogen are the two main gases that make up the Earth's atmosphere.
What year was river lee built?
Rivers are not built, they occur naturally, so there is no year that the river Lee was built.Rivers are not built, they occur naturally, so there is no year that the river Lee was built.Rivers are not built, they occur naturally, so there is no year that the river Lee was built.Rivers are not built, they occur naturally, so there is no year that the river Lee was built.Rivers are not built, they occur naturally, so there is no year that the river Lee was built.Rivers are not built, they occur naturally, so there is no year that the river Lee was built.Rivers are not built, they occur naturally, so there is no year that the river Lee was built.Rivers are not built, they occur naturally, so there is no year that the river Lee was built.Rivers are not built, they occur naturally, so there is no year that the river Lee was built.Rivers are not built, they occur naturally, so there is no year that the river Lee was built.Rivers are not built, they occur naturally, so there is no year that the river Lee was built.
Where does an elephant occur naturally?
There are two types - distinguishable by ear size. The African or the Indian elephant
Metals occur naturally in what state?
in there native state
What element does not occur naturally on earth?
Astatine is an element that does not occur naturally in large quantities on Earth.
