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What is the rarest element on earth?
The rarest naturally occurring element on Earth is astatine. It is a radioactive element with a very short half-life, making it extremely rare and difficult to study. It is estimated that there is only a few grams of astatine present in the Earth's crust at any given time.
Which important element was missing in earths early atmosohere?
Oxygen was the important element missing in Earth's early atmosphere. It was only produced later by photosynthetic organisms.
Is promethium representative or transition element?
Promethium is a transition element. It is the only element in the lanthanide series that is radioactive and does not occur naturally on Earth. Its atomic number is 61, and it is commonly used in nuclear batteries and research applications.
What is the rarest object on the earth?
One of the rarest objects on Earth is the red diamond due to its unique coloration and limited supply. These diamonds are highly sought after by collectors and can fetch millions of dollars at auctions. Additionally, some meteorites, such as those from Mars or the moon, are also extremely rare and valuable.
What is the rarest gas element in the earth's atmosphere?
Xenon is the rarest gas element in the earth's atmosphere. It represents 90 parts-per-billion of the total atmosphere.
What element in group 7 is so rare that there are only few grams of it on earth?
I don't know this answer for sure, but I would bet that it is astatine. All of the other group 7 elements (flourine, chlorine, bromine and iodine) are all relatively plentiful.
What is the rarest element on earth?
The rarest naturally occurring element on Earth is astatine. It is a radioactive element with a very short half-life, making it extremely rare and difficult to study. It is estimated that there is only a few grams of astatine present in the Earth's crust at any given time.
The alkaline earth element having the largest atomic radius is found in period?
7th period because atomic size down the group increases. And Alkali Earth metals are found only in Group 1. The element is in Group 1 and period 7
Which group in the periodic table contain only metal?
There are many groups in the periodic table that only contain metals. There are the Alkali metals, the Alkaline earth metals, Lanthanoids, Actinoids, Transition metals, and the Post-transition metals.
What is The only group 16 element that is gas at room temperature?
In group 16 on the periodical table the only element that is a gas at room temperature is oxygen (O).
What is the smallest number of a group?
You can have a Group with only one element: 0 if it an additive group or 1 if it is multiplicative.
What element is in the halide group and is the only liquid?
the only liquid halide is bromine
How much does Mercury weigh?
The planet Mercury has no weight, as this would be expressed within a gravitational field. The mass of Mercury is estimated as 3.3 ×10²³ kilograms (only about 5.5% of Earth's mass).The element Mercury has a density of 13.5 grams/ml (13.5 grams/cm3).
How many planets are in the earth group?
There is only one planet in the Earth group, which is Earth itself.
What element is the only nonmetal in group 14?
Carbon (C)
How much does Mercury?
The planet Mercury has no weight, as this would be expressed within a gravitational field. The mass of Mercury is estimated as 3.3 ×10²³ kilograms (only about 5.5% of Earth's mass).The element Mercury has a density of 13.5 grams/ml (13.5 grams/cm3).
What is the element in group 2 that exist as a liquid at room temperature?
No element in Group II is a liquid at room temperature. The only elements that are liquid at room temperature are bromine, which is in Group VII, and mercury, which is a transition metal and Lord only knows how your book defines those, but it's almost certainly NOT Group II. (It could, conceivably, be Group IIB, though the whole thing of group numbers is one of the stupider concepts in chemistry, especially since there are at least three mutually incompatible ways of defining them.)
