It is an element
Yes. It is the compound of the elements Beryllium and fluorine.
Neither. It is an element. Also, by definition if a substance is pure it cannot be a mixture; it mus either be an element or a compound.
Beryllium is an element. It is not a compound
Beryllium is the element found in the mineral compound beryl.
Be, or beryllium, is not a compound - it is an element.
As a compound
Beryllium is a pure chemical element.
Beryllium is an element, specifically a chemical element with the symbol Be and atomic number 4. It is classified as a metal and is found in the periodic table. As an element, it cannot be broken down into simpler substances by chemical means.
Mixture
no beryllium aluminium silicate is not an element. It is one of the beryllium compounds.
Beryllium (Be) is an element. It is part of the alkaline earth metals.
electricity is not a compound, mixture or element.