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What is the rarest atom?
Many isotopes of astatine are considered the rarest naturally occurring elements on Earth. Astatine is highly radioactive and has very short half-lives, making it difficult to study and find in nature.
Is the atomic size of francium greater than that of cesium?
Yes, the atomic size of francium is greater than that of cesium. Francium is located below cesium in the same group on the periodic table, so as you move down the group, atomic size generally increases.
How many valence electrons does astatine have?
Astatine has 125 neutrons
What at the common compounds formed by astatine?
Some common compounds formed by astatine include hydrogen astatide (HAt), astatine monochloride (AtCl), astatine monobromide (AtBr), and astatine monoxide (At2O). Due to the scarcity and radioactive nature of astatine, its compounds are not commonly studied.
What is the word equation for sodium and astatine?
The word equation for the reaction between sodium and astatine is: sodium + astatine → sodium astatide.
What does polonium astatine francium uranium thorium and radium have in common?
All these elements are natural radioactive elements.
What elements are more reactive than most?
Caesium and francium, in group one or in group 7 iodine or astatine.
10 most expensive elements and their uses?
Examples: californium, americium, curium, iridium, rhenium, osmium, palladium, francium, astatine, technetium.
What is the radioactive alkali metal?
Francium name by the Curies after france. Yes it is rare and radioactive.
What is the rarest atom?
Many isotopes of astatine are considered the rarest naturally occurring elements on Earth. Astatine is highly radioactive and has very short half-lives, making it difficult to study and find in nature.
What is the least abundant of the eight rock-forming elements that make up most of the continental crust?
The least abundant of the eight rock-forming elements in the continental crust is potassium, with an average abundance of around 2.6%. The other rock-forming elements are oxygen, silicon, aluminum, iron, calcium, sodium, and magnesium.
What state do you predict francium to be in at a room temperature?
Francium should be a solid at standard temperature and pressure, as is cesium, the element next above it in its periodic table column. Note, however, that francium is so highly radioactive that it may be difficult to maintain any actual sample of it at standard temperature and pressure.
What are the least abundant elements?
The least abundant elements in the Earth's crust are typically the rare earth elements such as thulium, lutetium, and hafnium. In the universe, elements such as francium and astatine are considered very rare.
Name 10 elements in the periodic table that are radioactive?
Some radioactive elements in the periodic table are radium, uranium, plutonium, thorium, polonium, radon, francium, astatine, radium, and curium.
Astatine has 85 protons what is the atomic number?
The atomic number is the number of protons, so the atomic number of astatine is 85.
What is an element named after frace?
Francium (pronounced /ˈfrænsiəm/, FRAN-see-əm), formerly known as eka-caesium and actinium K,[1] is a chemical element that has the symbol Fr and atomic number 87. It has one of the lowest electronegativity of all known elements, and is the second rarest naturally occurring element (after astatine). Francium is a highly radioactive metal that decays into astatine, radium, and radon. As an alkali metal, it has one valence electron.
What type of element is astatine?
Astatine is an element with the symbol At.
