There is no element whose symbol is An.
gold is a metal element. atomic number of it is 79.
his observations led him to believe that gases are made of individual particles are very similar to the idia of the atom proposedby democritus
no of electrons in any atom is equal to the atomic number of that element so no of electron is 80
Atomic weight is a unit of measure whose unity value is that of the mass of a Hydrogen atom "1".
John Dalton
The atomic theory of matter can be attributed to the ideas proposed by the ancient Greek philosopher Democritus. He hypothesized that all matter is composed of indivisible and indestructible particles called atoms, which differ in shape, size, and arrangement. Democritus' atomic theory laid the foundation for modern atomic theory.
The kinetic theory of matter states that matter is made of particles whose speed is is dependent on the temperature of the substance. As temperature increases, the average speed of particles also increases.
The work of John Dalton is credited with being the beginning of modern atomic theory. In the early 19th century, Dalton proposed that all matter is composed of indivisible particles called atoms, each with its own unique properties. His atomic theory laid the foundation for our understanding of elements and compounds.
Fluorine (whose atomic number is 9) and Boron (whose atomic number is 5).
Louis de Broglie was the scientist who proposed the hypothesis of wave-particle duality. This idea helped to further the development of the theory of atomic structure, particularly in understanding the behavior of electrons within atoms.
Pythagoras
Leucippus is a mysterious figure whose exact dates are unknown - some say he never existed - but is still considered the be the founder of the Atomistic theory. Democritus was born 460 B.C. and died 370 B.C. He was a disciple of Leucippus and both men are credited with the atomistic theory.
There is no element whose symbol is An.
gold is a metal element. atomic number of it is 79.
his observations led him to believe that gases are made of individual particles are very similar to the idia of the atom proposedby democritus
Aluminium is a non metal element. Atomic mass of it is 26.982.