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compound
a neutral compound?
If you have pure magnesium, then the two atoms that compose the substance are going to be magnesium atoms. Magnesium is an element, a pure substance composed of all the atoms of the same kind. It is not to be confused with a compound which is made up of two or more atoms of different elements.
Element
A molecule is 2 or more atoms clinging together in some fashion. The molecule can be simple, that is, the same substance as the atoms, or it can be compound, that is, the atoms are different, and are of a different substance as the atoms.
molecule
A substance in which all atoms are identical is called an element.
compound
a neutral compound?
The atoms of an element are all identical.
Put simply, a substance that has all the same atoms in, is classified as an element.
On heating there will be a change in the physical state not chemical composition. So the number of atoms will be the same even after change in state.
A pure substance in which all the atoms have the same atomic number or number of protons is an element.
If you have pure magnesium, then the two atoms that compose the substance are going to be magnesium atoms. Magnesium is an element, a pure substance composed of all the atoms of the same kind. It is not to be confused with a compound which is made up of two or more atoms of different elements.
Element
Mole
a pure substance is that which contains same atoms or same molecules..