PowerPoint - Models of the Atom
... …we must first have a basic understanding of how that concept evolved. It took 2500 years to get to where we are now, but the pace has really heated up in the last century! ...
... …we must first have a basic understanding of how that concept evolved. It took 2500 years to get to where we are now, but the pace has really heated up in the last century! ...
Chemical Bonds
... compounds An atom is chemically stable when it has a complete outer energy level ...
... compounds An atom is chemically stable when it has a complete outer energy level ...
Note-taking Strategy Your notes should contain a title with
... Summary: The idea of the atom was proposed over 2500 years ago. Democritus taught that the atom was the tiniest particle of matter. He thought of it as a tiny, indivisible, indestructible particle. However, his ideas were not based on any scientific experimenting. 2000 years later in England, John ...
... Summary: The idea of the atom was proposed over 2500 years ago. Democritus taught that the atom was the tiniest particle of matter. He thought of it as a tiny, indivisible, indestructible particle. However, his ideas were not based on any scientific experimenting. 2000 years later in England, John ...
Atomic Structure
... All elements are composed of tiny indivisible particles called atoms II. Atoms of the same element are identical. The atoms of any one element are different from those of any other element. III. Atoms of different elements can physically mix together or can chemically combine in simple whole number ...
... All elements are composed of tiny indivisible particles called atoms II. Atoms of the same element are identical. The atoms of any one element are different from those of any other element. III. Atoms of different elements can physically mix together or can chemically combine in simple whole number ...
Atomic Crossword Name: Period: ____
... 11. A _____________ electron is in the outermost shell of an atom 12. Formed when atoms share electrons 14. Has a different number of neutrons than normal 15. The splitting of an atomic nucleus (usually with heavy elements) 17. British scientist who formulated our modern atomic theory 22. The mergin ...
... 11. A _____________ electron is in the outermost shell of an atom 12. Formed when atoms share electrons 14. Has a different number of neutrons than normal 15. The splitting of an atomic nucleus (usually with heavy elements) 17. British scientist who formulated our modern atomic theory 22. The mergin ...
The Atomic Theory of Matter
... Law of conservation of mass (matter): During a chemical reaction, the total mass before reaction is equal to the total mass after reaction. ...
... Law of conservation of mass (matter): During a chemical reaction, the total mass before reaction is equal to the total mass after reaction. ...
Zumdahl`s Chapter 2
... tissue proving protons (p+) in nucleus F.A. Aston (1919) “weighs” atomic ions J. Chadwick (1939) observes neutrons (no charge) by decomposition (to p+, e–, and ). ...
... tissue proving protons (p+) in nucleus F.A. Aston (1919) “weighs” atomic ions J. Chadwick (1939) observes neutrons (no charge) by decomposition (to p+, e–, and ). ...
The Nature of Molecules
... • There are discrete energy levels surrounding the nucleus of an atom; one level contains only 1 orbit of electrons, others contain 4 different orbits of electrons (each orbit is filled with 2 e-’s) • The filling of orbitals and energy levels relates to the chemical behavior of atoms • The number of ...
... • There are discrete energy levels surrounding the nucleus of an atom; one level contains only 1 orbit of electrons, others contain 4 different orbits of electrons (each orbit is filled with 2 e-’s) • The filling of orbitals and energy levels relates to the chemical behavior of atoms • The number of ...
chapter 6 sec 2 resonance structure
... H2O is a molecule which makes H2O a molecular compound and a molecular formula. But H2O is also a chemical formula because we use atomic symbols and subscripts to describe it. ...
... H2O is a molecule which makes H2O a molecular compound and a molecular formula. But H2O is also a chemical formula because we use atomic symbols and subscripts to describe it. ...
Atomictheory
... Atomic Theory • All elements are composed of atoms that cannot be divided. • All atoms of the same element are exactly alike and have the same mass. Atoms of different elements are different and have different masses. • An atom of one element cannot be changed into an atom of different elements. At ...
... Atomic Theory • All elements are composed of atoms that cannot be divided. • All atoms of the same element are exactly alike and have the same mass. Atoms of different elements are different and have different masses. • An atom of one element cannot be changed into an atom of different elements. At ...
Diapositiva 1
... all matter was made up of some tiny, fundamental particle. – Called this particle “ATOMOS” – meaning “indivisible” ...
... all matter was made up of some tiny, fundamental particle. – Called this particle “ATOMOS” – meaning “indivisible” ...
The Nature of Matter
... • General definition: molecules are the smallest part of a compound. • Formed by combining 2 or more of the SAME atom or DIFFERENT atoms • Note: molecules are covalently bonded • Ex: H2, O2, N2 ,H20, C6H12O6 ...
... • General definition: molecules are the smallest part of a compound. • Formed by combining 2 or more of the SAME atom or DIFFERENT atoms • Note: molecules are covalently bonded • Ex: H2, O2, N2 ,H20, C6H12O6 ...
Chapter 4 4.1 Defining the Atom • Early Models of the Atom atom
... 1) All elements are composed of tiny indivisible particles called atoms 2) Atoms of the same element are identical. Atoms of any one element are different from those of any other element 3) Atoms of different elements can physically mix together or can chemically combine in simple whole-number ratio ...
... 1) All elements are composed of tiny indivisible particles called atoms 2) Atoms of the same element are identical. Atoms of any one element are different from those of any other element 3) Atoms of different elements can physically mix together or can chemically combine in simple whole-number ratio ...
Chap 11 Sect 1 Notes Atomic Theory
... matter consists of tiny particles called atoms. Atoms cannot be created, divided, ...
... matter consists of tiny particles called atoms. Atoms cannot be created, divided, ...
Atomic Models
... I) A little bit of history… Democritus (400 BC) - thought that matter was made of particles called ________, but we couldn’t prove this until 2000 years later! Antoine Lavoisier (1743-1794) - French chemist - developed.. - his law stated that matter cannot be ___________________________ in a chemica ...
... I) A little bit of history… Democritus (400 BC) - thought that matter was made of particles called ________, but we couldn’t prove this until 2000 years later! Antoine Lavoisier (1743-1794) - French chemist - developed.. - his law stated that matter cannot be ___________________________ in a chemica ...
Modern Atomic Theory - hrsbstaff.ednet.ns.ca
... • An element is a pure substance made up of one type of particle, or atom. Each element has its own distinct properties and cannot be broken down into simpler substances by means of a chemical change. • Compounds are pure substances that are made up of two or more elements chemically combined togeth ...
... • An element is a pure substance made up of one type of particle, or atom. Each element has its own distinct properties and cannot be broken down into simpler substances by means of a chemical change. • Compounds are pure substances that are made up of two or more elements chemically combined togeth ...
Exam 1 Review Questions
... Covalent compounds contain both metal and nonmetal atoms. Ionic compounds are made of molecules. Dmitri Mendeleev published the first modern atomic theory in 1805. Fluorine is found as a metal in its pure form. Francium chloride FrCl is a covalent compound. Graphite is a compound containing carbon a ...
... Covalent compounds contain both metal and nonmetal atoms. Ionic compounds are made of molecules. Dmitri Mendeleev published the first modern atomic theory in 1805. Fluorine is found as a metal in its pure form. Francium chloride FrCl is a covalent compound. Graphite is a compound containing carbon a ...
The Atom
... Believed indivisible, indestructible, unchangeable Atoms- different shapes and sizes Determined physical properties of material Ex: atoms of liquids were thought to be smooth, which would allow the atoms to slide over each other. ...
... Believed indivisible, indestructible, unchangeable Atoms- different shapes and sizes Determined physical properties of material Ex: atoms of liquids were thought to be smooth, which would allow the atoms to slide over each other. ...
Atomic Theory NS
... SC3. Students will use the modern atomic theory to explain the characteristics of atoms. ...
... SC3. Students will use the modern atomic theory to explain the characteristics of atoms. ...
History of molecular theory
In chemistry, the history of molecular theory traces the origins of the concept or idea of the existence of strong chemical bonds between two or more atoms.The modern concept of molecules can be traced back towards pre-scientific Greek philosophers such as Leucippus who argued that all the universe is composed of atoms and voids. Circa 450 BC Empedocles imagined fundamental elements (fire (20px), earth (20px), air (20px), and water (20px)) and ""forces"" of attraction and repulsion allowing the elements to interact. Prior to this, Heraclitus had claimed that fire or change was fundamental to our existence, created through the combination of opposite properties. In the Timaeus, Plato, following Pythagoras, considered mathematical entities such as number, point, line and triangle as the fundamental building blocks or elements of this ephemeral world, and considered the four elements of fire, air, water and earth as states of substances through which the true mathematical principles or elements would pass. A fifth element, the incorruptible quintessence aether, was considered to be the fundamental building block of the heavenly bodies. The viewpoint of Leucippus and Empedocles, along with the aether, was accepted by Aristotle and passed to medieval and renaissance Europe. A modern conceptualization of molecules began to develop in the 19th century along with experimental evidence for pure chemical elements and how individual atoms of different chemical substances such as hydrogen and oxygen can combine to form chemically stable molecules such as water molecules.