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Atoms Development of the Atomic Theory
Atoms Development of the Atomic Theory

... substances are made of atoms that cannot be created, divided, or destroyed  atoms join with other atoms to make new substances  atoms of the same element are exactly alike, ...
Chapter 2 ppt
Chapter 2 ppt

... Electrons reside in specific shells, subshells and orbitals, and fill these shells in a specific order (lowest energy first) Atoms interact and undergo chemical reactions to achieve a stable (full) valence shell ...
File
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... Definition: Atomic Number: # of p+ in the nucleus Of an element is the _______________________________________________ of its atoms. No two elements have the _______ Same atomic number. This number defines an ________________. ...
File - Mrs. Wernau`s Pre
File - Mrs. Wernau`s Pre

... 2. Atoms of the same element are alike…same size, mass, and other properties. 3. Atoms are not subdivided, created, or destroyed. 4. Atoms of different elements combine in simple whole-number ratios to form chemical compounds. 5. In chemical reactions, atoms are combined, separated, or rearranged. T ...
CHAPTER 2: THE ATOMS AND MOLECULES OF ANCIENT EARTH
CHAPTER 2: THE ATOMS AND MOLECULES OF ANCIENT EARTH

... b. Reduction of CO2 by H2 forms H2CO, which is used as a building block to form organic compounds (compounds containing at least one C–C bond). (Fig. 2.13) B. For carbon to be reduced, early atmosphere must have contained CH 4, H2, and NH3 (molecules that can give up electrons). 1. Volcanic ash is k ...
Bonding in Atoms
Bonding in Atoms

... • Compounds of ionic bonding are often solid at room temperature • Compounds will have a high melting point with ionic bonds • Compounds will become conductive when melted or dissolved ...
The Atom
The Atom

... → electrons gain energy and jump to higher energy levels, but ultimately fall to lowest energy level (or ground state), see Fig. 5.13 on p.121 → light separated into narrow bands called an emission line spectrum – also called an "atomic fingerprint" since each element emits its own unique spectrum, ...
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... the quantum theory. Bohr incorporated the quantum theory into Rutherford’s model, which solved a lot of the problems and explained not only why atoms show spectra, but predicted where the lines for hydrogen would be. Unfortunately it didn’t work very well for bigger atoms. The currently accepted mod ...
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Workshop Tutorials for Introductory Physics Solutions to QI2: Atomic

... the quantum theory. Bohr incorporated the quantum theory into Rutherford’s model, which solved a lot of the problems and explained not only why atoms show spectra, but predicted where the lines for hydrogen would be. Unfortunately it didn’t work very well for bigger atoms. The currently accepted mod ...
Exam 2b Key Fall 2010
Exam 2b Key Fall 2010

... c. Atoms combine in whole number ratios to form compounds. d. Atoms can combine in different ratios to form different compounds. 8. When alpha particles were shined on a piece of gold foil in Rutherford’s experiment… a. Most particles went through undeflected. b. Some particles were deflected at lar ...
Chapter 13 Electrons in Atoms
Chapter 13 Electrons in Atoms

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No Slide Title
No Slide Title

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Electron shells
Electron shells

... 1. Read the text and tell me if there are words you do not understand. Amount = quantity Handheld = hold by the hands 2. Questions about the text: (Le cours sur les spectres a déjà été vu en français) How did Niels Bohr explain the lines in atomic spectra? → Lines in atomic spectra should correspond ...
Atomic Structure PPT
Atomic Structure PPT

... famous experiment. they fired Helium nuclei at a piece of gold foil which was only a few atoms thick. they found that although most of them passed through. About 1 in 10,000 hit the detector ...
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(+) = # of electrons

... •Electrons in lower numbered shells are closer to the nucleus and are lower in energy. •Electrons in higher numbered shells are further from the nucleus and are higher in energy. ...
Atoms, and Elements
Atoms, and Elements

...  Isotopes (atoms of the same element but with different masses) were discovered ATOM – defined as the smallest particle of an element that can enter into a chemical reaction B. Basic Laws of Chemistry explained the postulates of the Atomic Theory 1. Lavoisier’s Law of conservation of mass: matter c ...
protons and neutrons
protons and neutrons

...  Atoms of a given element are identical in size, mass, and other properties; atoms of different John Dalton elements differ in size, mass, and other properties  Atoms cannot be subdivided, created, or destroyed  Atoms of different elements combine in simple whole-number ratios to form chemical co ...
CHEM_Review - Kenston Local Schools
CHEM_Review - Kenston Local Schools

... Counting Atoms The formula for a compound indicates the elements that make up the compound and the number of atoms of each element present in the compound. These numbers of atoms are indicated by the use of small numbers called subscripts. Sometimes groups of atoms act as a single atom. Such a grou ...
Worksheet
Worksheet

... 8. ____________________ Who put electrons in energy levels? 9. ____________________ Who discovered the electron? 10. ____________________ Who discovered that the atom is mostly empty space? 11. ____________________ Which scientist determined the charge of the electron? 12. ____________________ Which ...
ViewpointAPBiology
ViewpointAPBiology

...  Life requires ~25 chemical elements  Atomic structure determines behavior of an element  Atoms combine by chemical bonding to form ...
oxidation number
oxidation number

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Chapter 3
Chapter 3

... 3. Atoms cannot be created, destroyed, or transformed into atoms of another element. 4. Compounds are formed when atoms of different elements combine with one another in small wholenumber ratios. 5. The relative numbers and kinds of atoms are constant in a given compound. ...
Atomic structure - Dayton Independent Schools
Atomic structure - Dayton Independent Schools

... which was only a few atoms thick. they found that although most of them passed through. About 1 in 10,000 hit ...
Lecture 5
Lecture 5

... Writing and Balancing Chemical Equations • Determine the type of reaction and formulae of the products • Write an unbalanced equation with the correct reactants and products • Balance the equation by the use of prefixes (coefficients) to balance the number of each type of atom on the reactant and p ...
7A SCIENCE FINAL REVIEW - MERRICK 7th SCIENCE REVIEW
7A SCIENCE FINAL REVIEW - MERRICK 7th SCIENCE REVIEW

... ___ Describe the difference between atoms and molecules. ___ Define elements, compounds, and mixtures. ___ Recognize elements from compounds if given the chemical symbol or a model. ___ Describe the difference between a chemical and physical property of matter, give examples of each. ___ Describe th ...
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Unbinilium

Unbinilium /uːnbaɪˈnɪliəm/, also known as eka-radium or simply element 120, is the temporary, systematic element name of a hypothetical chemical element in the periodic table with the temporary symbol Ubn and the atomic number 120. Unbinilium and Ubn are the temporary systematic IUPAC name and symbol, until a permanent name is decided upon. In the periodic table of the elements, it is expected to be an s-block element, an alkaline earth metal, and the second element in the eighth period.To date, all attempts to synthesize this element have been unsuccessful. Its position as the seventh alkaline earth metal suggests that it would have similar properties to the alkaline earth metals, beryllium, magnesium, calcium, strontium, barium, and radium; however, relativistic effects may cause some of its properties to differ from those expected from a straight application of periodic trends. For example, unbinilium is expected to be less reactive than barium and radium and be closer in behavior to strontium, and while it should show the characteristic +2 oxidation state of the alkaline earth metals, it is also predicted to show the +4 oxidation state unknown in any other alkaline earth metal.
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