Pure barium is very hard to prepare, to the extent that many of its properties are unknown. The these circumstances it is difficult to identify the uses of the pure element.
This formula tells you that the compound has one atom of the element Barium and two atoms of the element Fluorine. It is called Barium Fluoride.
No. Barium is a Group 2 element, and as such will lose its two valence electrons to form a Ba2+ ion when forming an ionic compound.
Barium is an element which does not occur in pure (native) form on Earth. The two most common minerals in which barium occurs are Barite (BaSO4) and Witherite (BaCO3). According to its entry on wikipedia, Barite has Perfect cleavage parallel to base and prism faces: {001} Perfect, {210} Perfect, {010} Imperfect. I am unsure what sort of cleavage Witherite has.
No. An element is a pure substance made of only one kind of atom. A compound is a pure substance made of two or more kinds of atom.
Beryllium, Magnesium, Calcium, Strontium, Barium and Radium
Any amount of only one element is pure. Purity refers to being one thing, not two or more.
There is no such thing. An element IS a pure substance.
no its a compound of two elements of hydrogen and oxygen
Fluorine would be the more reactive element because it needs to gain one electron. While Barium needs to gain two electrons. Thus it is easier to gain one than to lose two.
There are 2 valence electrons in Barium.
Barium can form two distinct compounds with oxygen as the only other element in the compound: barium oxide with formula BaO and barium peroxide with formula BaO2. The first of these compounds is more common and more stable.
Group 2 elements such as magnesium, calcium, barium, strontium (and also many elements from transition metals)