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All the rare earth elements are natural chemical elements (including prometium - element obtained also artificialy).

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Are actinides and lanthanide elements transition metals?

no they are not. actinide is not part of the transition metals.


What machine makes most synthetic elements?

Synthetic elements are obtained: - in nuclear reactors - as a result (in debris) of nuclear weapons explosions - with the aid of particle accelerators


How do most elements on earth occur?

Most elements on the Earth occur as oxides or silicates.


What is the name of the series which contains most of the synthetic and radioactive elements?

All of the actinides are radioactive, and almost all are synthetic.


Are most of the actinides synthetic elements?

Yes, most actinides are synthetic elements, meaning they are not naturally found on Earth and need to be created in a laboratory through nuclear reactions. The only exception is uranium, which is the only actinide that occurs naturally in significant quantities on Earth.


Where are most synthetic elements found on periodic table?

These elements are found after uranium.


To make most synthetic elements scientist use machines called?

Particle accelerators are often used to create most synthetic elements. These machines accelerate particles to high speeds and then collide them to form new elements through nuclear reactions.


What are the three most abundant elements in th earth's atmosphere and the elements?

These elements are nitrogen, oxygen and argon.


The most abundant elements in earth's crust are?

The most common element in the earth's crust is oxygen.


What is gold mostly used for?

Mostly it is used to back national currencies as it is considered one of the rarest and most valuble elements on Earth.


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.


Is oxygen a trace element?

No, oxygen is not considered a trace element. It is one of the most abundant elements on Earth, making up about 21% of the atmosphere. Trace elements are present in much smaller quantities.