Lead is an element.
But both an elements and compounds are pure substances.
Yes, it is.
A lead weight is made from the metallic element Lead (symbol Pb) so it is simply a pure element, it is not a mixture or a compound.
Helium itself is an element and it forms no chemical compound whatsoever, therefore, it is a noble gas. The atom of Helium is so inert that it cannot even form a molecule with another atom of Helium, hence is monoatomic.
Steam is a form of water , so it is made up of hydrogen and oxygen at a perfect ratio.This why it can be said that steam is a compound, therefore it is neither homogeneous nor heterogenious mixture. Steam is a form of water , so it is made up of hydrogen and oxygen at a perfect ratio.This is why it can be said that steam is a compound, therefore it is neither homogeneous nor heterogenious mixture.
The terms element and compound are used to identify pure substances.
yes, a diamond is a crystalline form of pure carbon, there for making it a pure substance.
It is a compound
Technetium is found in both in a compound and pure forms
Calcium is never found in its elemental form in nature.
In nature, titanium is always found as a compound, not as a pure metal. Titanium is highly reactive (although less reactive alloys can be made from it).
coal is actually a pure form of elemental carbon but the mined coal may contain earthy impurities imp
Compound, no group 2 or group 1 (except H if its considered) exist in elemental form naturally.
sodium, combined with chlorine, it makes salt, but in pure form, it explodes in water
Yes. helium is found in its elemental form. it is chemically inert as it has completely filled orbitals.
In its pure form it is a compound: sulphuric acid. But usually it is a mixture of sulphuric acid and lead sulphate.
No - lead weights are usually fairly pure lead and thus an element and not a compound.
pure form
K is an element. It is elemental Potassium metal.