Not very much matter is made up of only one kind of atom. Graphite in pencil leads is a popular one, but most matter is made up of several kinds of atoms.
when a sample of matter contains only one type of atom it is called an element.
a pure substance! ;)
a pure substance! ;)
The chemical symbol of zinc is Zn; "macroscopic sample element" is a strange formulation in chemistry.
sand is a mixture, not a compound.. silicon dioxide is just a compound
it has 6 gram of copper
if you have a water sample that contains either nitrate chloride.
a pure substance! ;)
a pure substance. :)
A pure substance is either an element or compound. Elements are composed of only one kind of atom, and compounds are composed of a definite proportion of atoms of different elements that is always the same.
By Crystalization
an element
an element
Identical molecules.
Because it is a element that is a liquid at a room tempeture
Because it is a element that is a liquid at a room tempeture
The smallest particle of matter that retains the properties of the element of which it is a sample.
Water (H2O) is a chemical compound.
"A phase is a state of a...system that has...uniform chemical composition and physical properties.""Matter." Wikipedia. 19 Feb 2008, 04:16 UTC. Wikimedia Foundation, Inc. 19 Feb 2008 .