What is the relation of an atom with a molecule
atom is the smallest particle. atom + atom = molecule (atom + atom you know interchange of electrons, is chemical bond )
what is difference between an element and a molecule
An element is like a cell that makes up a molecule. A molecule is many different elements. CO2 is carbon and oxygen squared. carbon and oxygen are elements and CO2 is a molecule. An element is a substance that cannot be broken down by either physical or chemical change. And a molecule the smallest particle of a substance that is still identified as that substance.
atoms have valence electrons at which have a certain energy (bonding energy) and when the enthalpy if favored they will bond. or the will disassociate depending on energy. but you have ionic or covalent bonding for your skill level right now there are several more. but when atom A1 bonds with A2 you make B12 which is a molecule. atoms are the building blacks of the molecule, think about it like a car is the molecule and the sparkplug is an atom. without it it wouldnt be the same molecule(car).
if two or more atoms are combined together, they form a molecule. usually we consider "atom' as one single particle, it can't be divided into smaller, identical particles with unchanged chemical properties, unlike molecules which can be divided. eg you cannot divided a helium atom into smaller pieces, i don't mean the stuff like electrons, protons or neutrons, But for chlorine molecules, Cl2, you can make in into chlorine atoms, Cl.
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