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During this presentation you will have hopefully learned about:
Atoms are the basic building blocks of ordinary matter. Atoms can join together to form molecules, which in turn form most of the objects around you. Atoms are composed of particles called protons, electrons and neutrons.
The purpose of an atom is to uniquely define a chemical element.Atoms are significant because they form the basic building blocks of all visible matter in the universe
Protons are a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.A proton is one of the most important types of subatomic particles. Protons combine with electrons and (usually) neutrons to make atoms. Protons are nearly the same size as neutrons and are much larger than electrons. ... Clouds of electrons orbit the nucleus, attracted by the positive charges of the protons.
A neutron is a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.Neutrons are important because they help keep the atom stable or balanced.
What are Electrons?
Electrons are the smallest of the particles that make up an atom, and they carry a negative charge. ... The atom's atomic number is the number of protons in the atom, which by default is also the number of electrons. The significance of Electrons is the bonding of individual atoms together.
What are Electrons?
The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom.Almost all of the mass in an atom is made up from the protons and neutrons in the nucleus with a very small contribution from the orbiting electrons. Neutrons have no charge and protons are positively charged. Because the nucleus is only made up of protons and neutrons it is positively charged.
Niels Henrik David Bohr was a Danish physicist who made foundational contributions to understanding atomic structure and quantum theory, for which he received the Nobel Prize in Physics in 1922. Born October 7th 1885 in Copenhagan,Denmark.He is the son of Christian Bohr and Ellen Adler Bohr. Bohr is know for his theory of the atom which states that a theory of atomic structure in which the hydrogen atom ( Bohr atom,) is assumed to consist of a proton as nucleus, with a single electron moving in distinct circular orbits around it, each orbit corresponding to a specific quantized energy state: the theory was extended to other atoms.
In 1913 Bohr proposed his quantized shell model of the atom to explain how electrons can have stable orbits around the nucleus. The motion of the electrons in the Rutherford model was unstable because, according to classical mechanics and electromagnetic theory, any charged particle moving on a curved path emits electromagnetic radiation; thus, the electrons would lose energy and spiral into the nucleus. To remedy the stability problem, Bohr modified the Rutherford model by requiring that the electrons move in orbits of fixed size and energy. The energy of an electron depends on the size of the orbit and is lower for smaller orbits. Radiation can occur only when the electron jumps from one orbit to another. The atom will be completely stable in the state with the smallest orbit, since there is no orbit of lower energy into which the electron can jump.
JUST THE FACTS
JUST THE FACTS!
Beryllium was discovered by Louis-Nicholas Vauquelin (FR) in 1798. The origin of the name comes from the Greek word beryllos meaning mineral beryl; also called glucinium from the Greek word glykys meaning sweet. It is a steel-grey metal resistant to attack by concentrated nitric acid.
Louis Nicolas Vauquelin, was a French pharmacist and chemist. Wikipedia
Born: May 16, 1763, Saint-André-d'Hébertot, France
Died: November 14, 1829, Saint-André-d'Hébertot, France
Nationality: French
Field: Chemistry
Books: Dictionary of Chemistry: Containing the Principles and Modern Theories of the Science, with Its Application to the Arts, Manufactures, and Medicine ; Including the Most Recent Discoveries and Doctrines of the Science
Discovered: Beryllium, Chromium
AND SO MUCH MORE...