a molecule, I think...
atom
Element
Everything tangible is at least one chemical; this includes water. Water is not an element, because it can be decomposed into oxygen and hydrogen by chemical means.
There is one atom of that element in the molecule.
no. wanna know why? a pure substance is made up of only one type of atom. atoms can't be broken down (divided) definition of an atom: that which cannot be divided. there ya go! ur welcome :) -shamansh
Atoms are the smallest particles of matter. An atom can not be divided by normal chemical means, they can only be divided during nuclear fusion.
retains the chemical identity of that element.
ATOM
Atoms: smallest unit of an element. Molecule: smallest unit of a compound., combination of atoms of the same or different elements., a group of atoms chemically bonded together. Both: divisible by chemical or nuclear means, smallest unit that can be isolated through physical changes.
elements: a pure substance which cannot be sub-divided into two or more simpler substances by any chemical or physical means is called an element. eg:carbon-C, oxygen-O2.compound: a pure substance which cannot be sub-divided into components by physical means but can be divided through chemical means is called a compound. eg: copper sulphate-CuSo4, water-H2O.
A substance that can not be decomposed into simpler substance by a chemical or physical means is a chemical element.
Mercury is an element, which means the smallest unit is a single atom.
An atom.
atom
This element is very reactive.
This chemical element is helium.
Element