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[DOC File]CHEMISTRY TEST---- ATOMIC STRUCTURE
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How many protons, electrons, and neutrons does an atom with an atomic number 50 and a mass number 120 contain? What does the number 84 in the name Krypton-84 represent? What is it’s symbol? Element Density (g/cm3) Aluminum 2.70 Zinc 7.13 Iron 7.87 Copper 8.96 Gold 19.3 Based on this table, what is the relationship between density and atomic ...
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[DOC File]Week 2, Lab 1: 9/15: Atoms
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(Proposed by G. N. Lewis) A hydrogen atom has one valence electron. A fluoride atom has seven valence electrons. We could represent each atom with the appropriate atomic symbol and a dot for each valence electron, shown in Figure 1. This designation makes the atom and its number of valence electrons easily identifiable.
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[DOC File]Week 2, Lab 1: 9/15: Atoms
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An 18O atom contains the same number of protons, neutrons, and electrons. 17) Using grammatically correct English sentences, describe what the isotopes of elements have in common. ... In a collection of marbles, 25% of the marbles have a mass of 5.00 g and 75% of the marbles have a mass of 7.00 g. The average mass of a marble is 6.50 g.
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[DOC File]Mole Calculation Worksheet
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Element or Compound # of Moles Molar Mass in g/mol Mass in grams # of particles Hydrogen, H 1 mole 1.01 g/mol 1.01 g 6.02x1023 atoms Hydrogen, H 0.2 moles 1.01 g/mol 0.201 g 1.20x1023 atoms Lithium, Li 9.4 moles Oxygen, O 25g Water, H2O 2.20x1023 atoms Sodium, Na 0.23 moles Chlorine, Cl 127g Sodium Chloride, NaCl 1.20x1024 atoms Sulfur Dioxide ...
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[DOC File]Lesson 2 | The Structure of Atoms
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An atom that has a charge because it has gained or lost electrons is called a(n) . c. ... G. neutron. H. proton 3. Matter and Atoms Name Date Class Chapter 11, Lesson 2. The Structure of Atoms. Directions: Use your textbook to respond to each statement. 1. All atoms have the same basic structure. The nucleus is the center region of the atom.
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[DOC File]Lesson 1 | Discovering Parts of an Atom
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Chadwick discovered the neutron , a neutral particle that exists in the nucleus of an atom. G. Bohr’s Atomic Model. 1. The atomic model of Bohr’s proposed that electrons move in circular orbits, or energy levels , around the nucleus. 2. When energy is added to an atom, electrons move to higher energy level ; when energy is released by the ...
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Honors Chemistry Worksheet on Electronic Structure of the …
17. Rank the following orbitals in the H atom in order of increasing energy: 3s, 2s, 2p, 4s, 3p, 1s, and 3d. 18. How many orbitals in an atom can have the following quantum number or designation? a) 3p e) 5d. b) 4p f) 5f. c) 4px g) n = 5. d) 6d h) 7s. Honors Chemistry Worksheet on Electronic Structure of the Atom …
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[DOC File]Name_____________________________
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a. nitrogen atom b. sodium atom c. sulfur atom d. bromine atom e. magnesium atom f. aluminum atom g. carbon atom h. neon atom. 4. Why do atoms become ions? 5. How many valance electrons are needed in order for an atom or ion to be stale? (What are the “magic” numbers?) 6. Which type of atom will always lose valance electrons to become an ...
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[DOC File]Grams/moles/molecules/atoms practice
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3.3 g NH3 X 1 mol NH3 X 6.022 e23 NH3 molecules X 1 N atom = 1.2 X 1023 N atoms. 17.03 g NH3 1 mol NH3 1 NH3 molecule. 3. How many . H atoms. are present in 2.3 moles of ammonia? ( 4.2 X 1024 H atoms) 4. If you have 9.1 grams of ammonia, how many . moles. of …
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[DOC File]Mole Conversions Worksheet
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Ans. 4.65 g. 5. How many particles are there in 1.43 g of a molecular compound with a gram. molecular mass of 233 g? Ans. 3.69 x 1021. 6. Aspartame is an artificial sweetener that is 160 times sweeter than sucrose (table sugar) when dissolved in water. It is marketed by G.D. Searle as Nutra Sweet. The molecular formula of aspartame is C14H18N2O5 .
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G to atom