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5. KingDraw
6. LewisStructures of All Elements
7. ElectronConfigurations of All elements
9. Year
Discovered of all Elements
10. Atomic
Number of all elements
12. Atomic
Mass of all Elements
13. Oxidation
States of all Elements
14. Standard
State of all Elements
15. Group
Block of all Elements
Chemistry
Chemistry is the science that
studies matter and the changes that occur to it, specifically by studying its
properties, structure, composition, behavior, interactions and what happens
through it. Chemistry studies atoms and the bonds that occur between them to
form molecules, and how these molecules are subsequently linked to form matter.
It also studies the interactions that occur between them. Chemistry is of great
importance in our lives, and it enters into many fields and plays an important
role in industries of all kinds, such as the food industries, the manufacture
of cleaning materials, paints, dyes, the manufacture of medicines and drugs,
textiles, clothing, weapons, and others. And it has other applications in
medicine and other sciences. Chemistry is called the "central
science", due to its essential role in linking the natural sciences
together.
Mole
The mole is a unit of measurement
for the amount of matter, and the modern definition of it is 6.02214076×1023
(Avogadro's number) of particles, such as atoms, molecules, ions, or electrons.
It was previously defined as the amount of a substance (atoms, molecules, or
ions) containing as much as 0.012 kg (12 g) of carbon-12, when the carbon atoms
were unbound and stable in the benthic state.
Atom
The atom is the basic unit in
chemistry. The atom consists of a nucleus around which negatively charged
electrons revolve; The nucleus is composed of positively charged protons and
neutrally charged neutrons; An atom has the same number of electrons and
protons, so its total electrical charge is zero, so we say that the atom is
electrically neutral, which explains the electrical neutrality of matter. In
some cases, by external energy transfer, an atom can lose or gain one or more
electrons; This phenomenon is called the ionization phenomenon. The atom is
also the smallest unit conceivable that is able to maintain the chemical
properties of the element, such as electronegativity, ionization energy,
preferred oxidation states, covalent number and number of preferred bonds to
form (such as metallic, ionic and covalent). The concept of the atom developed
throughout history, after its first model, which was put by Dalton, was an
indivisible, solid ball, to the current model, which is a nucleus consisting of
quarks and gluons surrounded by an electron cloud revolving around the nucleus.
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