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Honors Biology Chapter 2 Power Point
Honors Biology Chapter 2 Power Point

... • What three possible atoms can make a hydrogen bond with hydrogen? • List the forces in order of strength. ...
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... J. J. Thomson had discovered the electron, a negatively charged, low mass particle present within all atoms. Properties of Electrical Charge: Electrical charge is a fundamental property of some of the particles that compose atoms and results in attractive and repulsive forces—called electrostatic fo ...
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...  3) Atoms of different elements can chemically combine with one another in simple whole number ratios (compounds)  4) In chemical reactions, atoms are separated, joined, and rearranged. Atoms of one element are never ...
Summary 4.1 Studying Atoms
Summary 4.1 Studying Atoms

... describe the possible locations of electrons around the nucleus. The electron cloud represents all the orbitals in an atom. An orbital is a region of space around the nucleus where an electron is likely to be found. An electron cloud is a good description of how electrons behave in their orbitals. T ...
Chapter 8: Periodic Properties of the Elements
Chapter 8: Periodic Properties of the Elements

... sublevel experience a greater attractive force to the nucleus and are not shielded as effectively • Penetration causes the energies of sublevels in the same principal level to not be degenerate (2s and 2p are different energies) • In the 4th and 5th principle levels, the effects of penetration cause ...
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... Electrons are almost 2000 times smaller than protons and neutrons, so almost all the mass of an atom is concentrated in its nucleus. ...
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Atomic Structure - s3.amazonaws.com

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...  represented in the periodic table as the transition metals, group 3B – 2B  first seen in the 3rd energy level  maximum ____ electrons “f” subshell  too complex of a shape to name  there are _______ orientations(positions)= orbitals  represented in the periodic table as the inner transition me ...
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CHEM 120 WEEK 11 LECTURES (INORGANIC WEEK 2) Dr. MD
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...  Contains only metals, apart from boron.  Boron is also the only element which does not form a stable trication (B3+) again will have too high a charge density to be stable. Why do the other elements form tri-cations (M3+ )? Soln. √ Because they have the valence electronic configuration ns2np1 and ...
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... 60. The density of aluminum is 2.70 g/cm3. What is the mass of a solid piece of aluminum with a volume of 1.50 cm3? a. 0.556 g b. 1.80 g c. 4.05 g d. 4.20 g 61. The statement that no two electrons in the same atom can have the same four quantum numbers is a restatement of a. Bohr’s law. b. Hund’s ru ...
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Extended periodic table

An extended periodic table theorizes about elements beyond element 118 (beyond period 7, or row 7). Currently seven periods in the periodic table of chemical elements are known and proven, culminating with atomic number 118. If further elements with higher atomic numbers than this are discovered, they will be placed in additional periods, laid out (as with the existing periods) to illustrate periodically recurring trends in the properties of the elements concerned. Any additional periods are expected to contain a larger number of elements than the seventh period, as they are calculated to have an additional so-called g-block, containing at least 18 elements with partially filled g-orbitals in each period. An eight-period table containing this block was suggested by Glenn T. Seaborg in 1969. IUPAC defines an element to exist if its lifetime is longer than 10−14 seconds, which is the time it takes for the nucleus to form an electronic cloud.No elements in this region have been synthesized or discovered in nature. The first element of the g-block may have atomic number 121, and thus would have the systematic name unbiunium. Elements in this region are likely to be highly unstable with respect to radioactive decay, and have extremely short half lives, although element 126 is hypothesized to be within an island of stability that is resistant to fission but not to alpha decay. It is not clear how many elements beyond the expected island of stability are physically possible, if period 8 is complete, or if there is a period 9.According to the orbital approximation in quantum mechanical descriptions of atomic structure, the g-block would correspond to elements with partially filled g-orbitals, but spin-orbit coupling effects reduce the validity of the orbital approximation substantially for elements of high atomic number. While Seaborg's version of the extended period had the heavier elements following the pattern set by lighter elements, as it did not take into account relativistic effects, models that take relativistic effects into account do not. Pekka Pyykkö and B. Fricke used computer modeling to calculate the positions of elements up to Z = 184 (comprising periods 8, 9, and the beginning of 10), and found that several were displaced from the Madelung rule.
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