Some elements that are not chemically combined with any other substance exist as single atoms.
Pure copper, pure lead, pure silver.
Oxygen does not, the pure state of oxygen is a diatomic molecule, O2.
It is to define the elements according to their groups.
Carbon-12 isotope is used to define the atomic mass unit, which is equal to 1/12th of the mass of a carbon-12 atom.
A liquid has the the shape of the container.
The total mass of the atom. In other words the total mass of the protons and neutrons of an atom
An element's atomic number tells you the number of protons in the nucleus of its atoms. This, in turn, can help predict its state of matter at room temperature. Elements with low atomic numbers are typically gases, while those with higher atomic numbers are solids or liquids.
Atomic number tells you the number of protons. There is no need to define a standard state.
the atomic electrons.
Atomic Mass units =]
atomic weight
It is to define the elements according to their groups.
Number of protons located in the nucleus.
Properties of elements are a periodic function of their atomic masses.
The atomic radii is the measure of the size of the atoms in a chemical element. This is the distance from the nucleus to the boundary of the electrons' cloud.
to state about
what is a circular state
Atomic mass.
Atomic structure, Chemical composition and External form.