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.
a pure substance! ;)
The chemical symbol of zinc is Zn; "macroscopic sample element" is a strange formulation in chemistry.
The characteristic that depends on the amount of matter in a sample is its mass. Mass is a measure of the amount of matter in an object or substance, and it can change depending on how much of the substance is present.
One limitation is that some compounds may have similar melting points to elements, leading to misinterpretation. Additionally, impurities in the sample can affect the melting temperature observed. Variation in heating methods and equipment can also impact the accuracy of the results.
Tungsten carbide is a metallic chemical compound. Unlike steel, it is not a mixture or alloy. The chemical formula for tungsten carbide is WC, indicating that the number of atoms of tungsten (W) in a sample of tungsten carbide is equal to the number of number of atoms of carbon (C) in that sample. Because each atom of tungsten weighs about 15.3 times as much as each atom of carbon, almost 94% of the mass of a sample of tungsten carbide is represented by tungsten atoms. Although tungsten carbide is not itself a mixture, it is often mixed (alloyed) with other metals such as nickel or cobalt.
a pure substance! ;)
a pure substance. :)
By Crystalization
an element
an element
Identical molecules.
Because it is a element that is a liquid at a room tempeture
Ammonia (NH3) is a compound, not an element. It is a homogeneous mixture when dissolved in water, but a pure sample of ammonia gas is considered a compound.
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 .
The smallest particle of matter that retains the properties of the element of which it is a sample.