Study of atoms

Answer 1

yes, it is possible to study just one atom.

for example, iron is an "element" that is made up of one atom.

that one atom has the properties of iron.

just one atom of that element, is the smallest part of that element.

Answer 2

The atom is a basic unit of '''matter''' that consists of a dense, central [[wiki/Atomic nucleus|nucleus]] surrounded by a cloud of [[wiki/Electric charge|negatively charged]] [[wiki/Electrons|electrons]]. The [[wiki/Atomic nucleus|atomic nucleus]] contains a mix of positively charged [[wiki/Proton|protons]] and electrically neutral [[wiki/Neutron|neutrons]] (except in the case of [[wiki/Hydrogen-1|hydrogen-1]], which is the only stable [[wiki/Nuclide|nuclide]] with no neutrons). The electrons of an atom are bound to the nucleus by the [[wiki/Electromagnetic force|electromagnetic force]]. Likewise, a group of atoms can remain bound to each other, forming a [[wiki/Molecule|molecule]]. An atom containing an equal number of protons and electrons is electrically neutral, otherwise it has a positive or negative charge and is an [[wiki/Ion|ion]]. An atom is classified according to the number of protons and neutrons in its nucleus: the [[wiki/Atomic number|number of protons]] determines the [[wiki/Chemical element|chemical element]], and the [[wiki/Neutron number|number of neutrons]] determines the [[wiki/Isotope|isotope]] of the element.The name atom comes from the [[wiki/Greek language|Greek]] "ἄτομος"-átomos (from α-, "un-" + τέμνω - temno, "to cut, which means uncuttable, or indivisible, something that cannot be divided further. The concept of an atom as an indivisible component of matter was first proposed by early [[wiki/Indian philosophy|Indian]] and [[wiki/Greek philosophy|Greek]] philosophers. In the 17th and 18th centuries, [[wiki/Chemist|chemists]] provided a physical basis for this idea by showing that certain substances could not be further broken down by chemical methods. During the late 19th and early 20th centuries, [[wiki/Physicist|physicists]] discovered subatomic components and structure inside the atom, thereby demonstrating that the 'atom' was divisible. The principles of [[wiki/Quantum mechanics|quantum mechanics]] were used to successfully [[wiki/Scientific modelling|model]] the atom. Atoms are minuscule objects with proportionately tiny masses. Atoms can only be observed individually using special instruments such as the [[wiki/Scanning tunneling microscope|scanning tunneling microscope]]. Over 99.9% of an atom's mass is concentrated in the nucleus,[[#cite note-5| ]] with protons and neutrons having roughly equal mass. Each element has at least one isotope with unstable nuclei that can undergo [[wiki/Radioactive decay|radioactive decay]]. This can result in a [[wiki/Nuclear transmutation|transmutation]] that changes the number of protons or neutrons in a nucleus. Electrons that are bound to atoms possess a set of stable [[wiki/Energy level|energy levels]], or [[wiki/Atomic orbital|orbitals]], and can undergo transitions between them by absorbing or emitting [[wiki/Photon|photons]] that match the energy differences between the levels. The electrons determine the chemical properties of an element, and strongly influence an atom's [[wiki/Magnetism|magnetic]] properties.

Answer 3

yeah its called an "electron microscope"
Certain microscopes such as the scanning tunneling microscope (STM) allow scientists to study single strands of DNA and even atoms.

Answer 4

we study atoms to know who ,when,where,and what .

Answer 5

Yes.