What is Atomic Structure?

Atomic structure and models in chemistry

Atomic structure describes the smallest unit of an atom that contains elementary particles like positively charged electrons, negatively charged protons, and neutral neutrons of the matter. Atom is the smallest unit of matter that contains the characteristic properties of chemical elements. An atom is considered to be made up of a tiny nucleus carrying neutrons and protons. The tiny nucleus is surrounded by negatively charged particles or electrons by a definite order arrangement.

The electronic structure of an atom holds the key to understand the chemical properties, chemical bonding, chemical reactions of the elements. In learning chemistry or biology, every chemical or biological molecule contains neutral or ionized atoms with a definite order arrangement. The Journey from the Daltonian model to the modern atomic structure is a long and arduous one.

Dalton atomic theory to modern structure model of atom in matter

Dalton’s Atomic Theory

Dalton’s atomic theory to modern fine structure of atoms in chemistry, John Dalton postulates limitation, Bohrs, Rutherford electron model of atom in matter…


Electron or electronic configuration formula and energy levels of orbitals in periodic table elements

Electron Configuration

Electronic Configuration Formula of Elements Electronic configuration or general electron configuration or electronic structure of atoms or ions based on the arrangement of orbital energy...
Ernest Rutherford model or nuclear planetary model of atom in chemistry or physics by gold foil experiment

Rutherford Model

Rutherford Model Nucleus and Electrons Rutherford model or nuclear planetary model of an atom in chemistry or physics describes by New Zealand born physicist Ernest...
Cathode ray discovery of elementary particles electron proton neutron

Elementary Particles

Types of Elementary Particles in Physics Elementary particles or subatomic constituents, electrons, protons, and neutrons in physics or chemistry are discovered by Scientist Thomson, Golstine,...
Atomic emission spectrum of hydrogen

Hydrogen Spectrum

Hydrogen Spectrum (Absorption and Emission) Hydrogen spectrum (absorption or emission), in optics, an impotent type of tool for the determination of the atomic structure of...
bohr model of hydrogen energy levels

Bohr Model

Bohr Model of Hydrogen Energy Levels Bohr Model of hydrogen atom was adopted by Neils Bohr in 1913 for the explanation of Rutherford theory and...
de Broglie wavelengths, frequency and energy relation for light photon or electron

de Broglie Relation

de Broglie Hypothesis and Relation de Broglie relation of wavelengths pointed out that just as photon light has both particle and wave nature, electrons have...
Atomic Theory and Structure MCQ Question Answer

Atomic Theory

MCQ Questions Answers on Atomic Theory Atomic theory questions answer (MCQ) set of contains 9 question answers related to Bohr's model of the hydrogen atom...
Set of the quantum numbers to define orbital diagram shapes

Quantum Number

Quantum Numbers Orbital Diagram Quantum numbers set like principal, azimuthal, magnetic, and spin quantum number and fine structure of electromagnetic spectrum lines of atoms in...
Electromagnetic spectrum radiation diagram or chart represent frequency, wavelength, energy in chemistry

Electromagnetic Spectrum

Electromagnetic Spectrum Diagram Electromagnetic spectrum radiation diagram and entire distribution chart represent the number of radiation spectra (frequency and wavelength) formed by the electrical field...
Electron arrangement structure of nitrogen atom


What is an Electron Particle? Electron, the lightest subatomic or elementary particle of atom carries a negative charge, 1.602176 × 10-19 coulomb or 4.8 ×...



Group 17 Elements

Fluorine element chemical symbol and the periodic table properties


Fluorine in Periodic Table Fluorine (F), chemical formula F2, atomic number 9 is the most electronegative and most chemically reactive member of the halogen family...