what is atomic structure ?
Answers
Answer:
The external human inguisitiveness regarding the composition of matter was somewhat pacified wheny John Dalton (1808) stated in this atomic theory that all matter consists of very small indivisible and indestructible solid particles called atoms. Somewhat clear picture regarding the composition or the interior of atom began to emerge during the earlier part of the twentieth century. It has now been established that an atom is composed of still smaller particles. The general framework of an atom is a massive positively charged nucleus at the centre, which is surrounded by practically weightless negatively charged electrons. So, an atom is composed of a nucleus and one or more electrons.
Answer:
An Atom is a small part of element that takes part in chemical reactions. It is made up of three subatomic structures called Protons, Neutrons, and Electrons.
Particle: Charge: Mass:
Proton +1 1 *u
Neutron 0 1 *u
Electron -1 1 / 1836*u
Positron +1. 1 / 1836*u
Explanation:
The nucleus, in the center of an atom, consist of protons and neutrons. Orbiting around the nucleus are the electrons. Each unique element has an Atomic Number equal to the number of protons it contains. There are 94 naturally occurring elements (1-94) and others which have been artificially created (95+..) Each element has an Atomic Weight for the most commonly found isotope. Atomic Weight = number of protons + number of neutrons. See: The Periodic table In a stable uncharged atom the number of electrons will equal the number of protons. If the number of electrons is changed the atom will become ionized and gain either a positive (fewer electrons) or negative (greater electrons) charge.Tritium is an unstable isotope of hydrogen.
Bohrs model Electrons are considered to move around the nucleus in fixed shells (orbits), at various energy levels. These levels may be designated K L M N shells ........ or 1 2 3 4 ........... Orbits . The first level contains only 2 electrons. The second level can hold 6electrons. The number of maximum electrons that can occupy one shell s defined by the formula of 2nî or 2 n square , where n is the number of the shell
When the electrons are excited, then they can transfer between the shells. As we move away from the nucleus, the energy levels increase.electrons have their own energy and the energy increases with increasing the n value or orbit