[I just had the misfortune of having to write an essay on Francium, for my GCSEs, so i decided to give some information on it to other people who need it for these kinds of circumstances.]
There is no more than one ounce of Francium in the Earths crust at any one time. In fact, unlike other alkali metals, it was not 'stumbled upon'. It took many years and a lot of studying to work out that there must be another group one element with a higher reactivity than Caesium. It is not possible to do any tests on Francium as it has a half life of 22 minutes but we can work out most things about it by looking at the other Group 1 metals....x...Prisca Zia...x...
Probably approx. 30 grams.
most reactive of all elements
The abundance of neodymium in the earths crust is approx. 40 ppm.
The abundance of lithium in the Earth crust is cca. 20 ppm.
silicon percent abundance in earths crust poops
The earths crust is a part of the outermost layer.
Silicon is a mixture of the minerals of the earths crust. so.... silicon isn't something from the earths crust. -thanks for your question.
The abundance of neodymium in the earths crust is approx. 40 ppm.
blah
its the percentage in mass !
The abundance of lithium in the Earth crust is cca. 20 ppm.
The abundance of radium in the earth crust is 9.10-10 mg/kg.
silicon percent abundance in earths crust poops
The earths crust is a part of the outermost layer.
Silicon is a mixture of the minerals of the earths crust. so.... silicon isn't something from the earths crust. -thanks for your question.
thinner and denser
The Earths crust is approximately 650 km deep.
Fluorine is found naturally in Earth's crust!
Protactinium is so scarce that the abundance in the Earth crust was not determined.