Everything in this world that occupies space is defined as the matter. The matter can be further split into two main categories, pure substance or mixture. Either the mixture or the pure substance, all the matter is made up of the atom, which is the smallest particle of the chemical element. People often found it difficult to differentiate between the terms like atom and molecule as they are closely related. As mentioned above, the atom is the smallest unit of a chemical element; it should be noted here that, two or more atoms combine to form the molecule. When identical atoms get amassed, it is known as the molecule of an element, and when atoms of two different elements get combined, they are known as the molecule of the compound.
The atom can’t be further divided, whereas the molecule can be further divided into atoms.
The atom is reactive as it is less stable as compared to the molecule. Contrary to this, the molecule is less reactive and more stable.
Atom may or may not exist in the free state while molecule always exists in the free state.
The atom comprises of the subatomic particles like neutron, electron, and proton. Conversely, the molecule comprises of two or more atoms.
Atom is the smallest unit of the chemical element, whereas two or more atoms combine to make up the molecule.
Atom
A part or particle considered to be an irreducible constituent of a specified system.
Molecule
The smallest particle of a substance that retains the chemical and physical properties of the substance and is composed of two or more atoms; a group of like or different atoms held together by chemical forces.
Atom
The irreducible, indestructible material unit postulated by ancient atomism.
Molecule
A small particle; a tiny bit.
Atom
An extremely small part, quantity, or amount.
Molecule
(chemistry) The smallest particle of a specific element or compound that retains the chemical properties of that element or compound; two or more atoms held together by chemical bonds.
Hydrogen chloride is a diatomic molecule, consisting of a hydrogen atom and a chlorine atom.
Atom
The smallest unit of an element, having all the characteristics of that element and consisting of a very small and dense central nucleus containing protons and neutrons, surrounded by one or more shells of orbiting electrons. Atoms remain undivided in chemical reactions except for the donation, acceptance, or exchange of valence electrons.
Atom
This unit regarded as a source of nuclear energy.
Molecule
One of the very small invisible particles of which all ordinary matter is supposed to consist.
Atom
The smallest possible amount of matter which still retains its identity as a chemical element, now known to consist of a nucleus surrounded by electrons.
Molecule
The smallest part of any substance which possesses the characteristic properties and qualities of that substance, and which can exist alone in a free state.
Atom
(history of science) A hypothetical particle posited by Greek philosophers as an ultimate and indivisible component of matter.
Molecule
A group of atoms so united and combined by chemical affinity that they form a complete, integrated whole, being the smallest portion of any particular compound that can exist in a free state; as, a molecule of water consists of two atoms of hydrogen and one of oxygen. Cf. Atom.
Atom
The smallest, indivisible constituent part or unit of something.
Molecule
(physics and chemistry) the simplest structural unit of an element or compound
Atom
(philosophy) In logical atomism, a fundamental fact that cannot be further broken down.
Molecule
(nontechnical usage) a tiny piece of anything
Atom
(historical) The smallest medieval unit of time, equal to fifteen ninety-fourths of a second.
Atom
A mote of dust in a sunbeam.
Atom
A very small amount; a whit.
Atom
An individual number or symbol, as opposed to a list; a scalar value.
Atom
(mathematics) A non-zero member of a partially ordered set that has only zero below it (assuming that the poset has a least element, its "zero").
In a Venn diagram, an atom is depicted as an area circumscribed by lines but not cut by any line.
Atom
An element of a set that is not itself a set; an urelement.
Atom
An age group division in hockey for nine- to eleven-year-olds.
Atom
An ultimate indivisible particle of matter.
Atom
The smallest particle of matter that can enter into combination; one of the elementary constituents of a molecule.
Atom
Anything extremely small; a particle; a whit.
There was not an atom of water.
Atom
(physics and chemistry) the smallest component of an element having the chemical properties of the element
Atom
(nontechnical usage) a tiny piece of anything
Atom is the smallest part of the chemical element that can exist in the Free State and also possess the chemical properties of its element. The atom is like the cell, which is the smallest structural and functional unit of the living. In other words, we can say that all the objects around us i.e. table, chair, sofa are made up of atoms. The physical and chemical properties of the certain element are the same in the atom of that matter. Atom is a kind of unit of the matter as everything that occupies space and has mass is known as matter, and at the same time, the atom is the smallest unit that can exist in the Free State. The atoms are less stable units as compared to the molecule, and to attain stability, they are highly reactive and form an immediate bond. Atoms may or may not exist in the free state, but the molecules always exist in the free state. The atoms comprise of the subatomic particles like nucleus, neutrons, protons, and electrons, although atom doesn’t get divided into its sub-atomic particles. The nucleus is the center most of the atom, around which proton and electron revolve. It should be kept noted that; the proton carries the positive charge, whereas the electron carries the negative charge.
Two or more than two atoms combine to form the molecule, which exists in the free state. The molecules can further get split into the atoms it is comprised of. Molecules are more stable than the atoms so they are less reactive and don’t take part in the chemical reaction. The chemical bond is formed in between the atoms, to form the molecule. Specifically, it is the covalent bond that is formed between the atoms to form the molecules. Or in other words, we can say that the exchange of electrons between the atoms takes place to form the molecule. When identical atoms get amassed, it is known as the molecule of an element, and when atoms of two different elements get combined, they are known as the molecule of the compound. The combination of atoms in fixed proportion is the complimentary task to make up the molecule. For instance, as we know that H2O is the formula of one molecule of water. Two atoms of Hydrogen and one atom of Oxygen get combined in the fixed proportion to form one molecule of water. But if the proportion of any of the element changes, the water molecule won’t be formed.
