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Final "I Can Statements" Answer Key
Final "I Can Statements" Answer Key

... If you can do all the things listed below, you are ready for the Unit 2 test. Place a checkmark next to each item that you can do! If a sample problem is given, complete it as evidence. _____1. I can still do everything from Unit 1. Definitions: atom – smallest particle of matter that retains the pr ...
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... Goal- Determine the number of protons (atomic number), number of neutrons, atomic mass, and identity of the nucleus of 5 different atoms for 5 different elements. Background (Periodic Table on page 84 and 85 in your textbook): Orange BB’s = protons and Green BB’s = neutrons • Number of protons + num ...
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... _____________________ 2. Stated that a given compound always has the same relative number and kinds of atoms. _____________________ 3. Discovered radioactivity while working with a sample of Uranium. _____________________ 4. Determined that a cathode ray is made of electrons. _____________________ 5 ...
Chapter 1 Chemistry: The Study of Matter
Chapter 1 Chemistry: The Study of Matter

... mixtures such as those in blood. The centrifuge spins rapidly and causes the solid to settle to the bottom. Ex. Separating blood ...
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...  Draw a nucleus with the element symbol inside.  Carbon is in the 2nd period, so it has two energy levels, or shells. ...
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Elements – (Metals)

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wahideh chemistry eportfolio hw

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The Mole - Rothschild Science

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The Atom

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Practice Packet Unit 3: Atomics - Mr. Palermo`s Flipped Chemistry

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Dalton`s Atomic Theory

... the atom. This later became known as Dalton’s atomic theory. The general tenets of this theory were as follows: • All matter is composed of extremely small particles called atoms. • Atoms of a given element are identical in size, mass, and other properties. Atoms of different elements differ in size ...
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Introduction to Computational Chemistry

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... A mole is equal to an elements atoms mass (the big number in the square of the elements periodic box) A mole is also equal to the sum of all the elements in a molecule or a compound Avogadro’s number is 6.022 X 1023 atoms This number represents the number of atoms that can be counted in one mole of ...
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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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