0
Technetium is entirely synthetic, no stable isetopes exist, which explains its natural absence on Earth.
Astatine is produced by radioactive decay in nature, due to its short half life it is found only in minute amounts.
There are no stable or long-lived isotopes of promethiumeither.
...
What else can I help you with?
What is the least common element in the atmosphere of the earth?
Nitrogen is the least abundant element in the atmosphere of the Earth. The most abundant element in the atmosphere of the Earth is oxygen.
Are metals the most abundant element in the Earth's crust?
Oxygen is the most abundant element in the Earth's crust.
What element has the greatest abundance in the Earth's crust?
Oxygen is the most common and abundant element in the Earth's crust having 47% of the mass.
What is the most abundant element on the face of the earth?
Oxygen is the most abundant element in the earth's crust.
Oxygen is the most abundant element by volume in Earth's?
Oxygen is the most abundant element in Earth's crust.
Is the most abundant element Earth and crust?
The most abundant element in Earth's crust is oxygen, making up about 46% of its mass. Silicon is the second most abundant element, comprising about 28% of the Earth's crust.
What two element are abundant in the Earth crusts?
The most abundant element in the Earth's crust is oxygen at 46%. The second is silicon at 28%.
The most abundant metal in Earth's crust?
The most abundant metal in the Earth's crust is iron. The most abundant element in the Earth's core is oxygen.
Most abundent element on Earth?
Hydrogen is the most abundant element found on Earth. Other abundant elements include helium, and oxygen, as well as silicon.
What is the most abundant element in entire earth?
There is incomplete info on the core, but Iron is likely to be it. However, since many elements in the crust are oxides and if you include water and atmospheric oxygen current information points that oxygen is the most abundant element on earth at about 45-50% of the Earth's mass (note its also the 3rd most abundant element in the universe) but element of the earth would be hydrogen (H) for every 1 oxygen on the earth there is 2 hydrogens (in normal air situations)Good answer=)(a wiki answers user was here..... not him^^^^^)Oxygen is the most abundant element in the earth's crust.
Which is the most abundant element in earth crust?
Aluminum is the most abundant metal in the crust of the Earth.
Was beryllium an common or abundant element?
Beryllium is not an abundant element: approx. 3 ppm in the earth crust.
