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Universities » University of Louisville (UL) » CHEM - Chemistry » 101 - INTRO TO CHEMISTRY - S » Flash Cards

Exam 1 - Flashcards

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Class:CHEM 101 - INTRO TO CHEMISTRY - S
Subject:Chemistry
University:University of Louisville
Term:Unknown
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Atom Basic unit of matter consisting of a dense, central nucleus surrounded by a cloud of negatively charged electrons.
Atomic Number the number of protons identical to the charge number represented by the symbol Z In an atom of neutral charge, atomic number is equal to the number of electrons
Balanced Equation # and type of atoms equal on both reactant and product side of equation
Celsius temperature scale Metric system temp scale
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Chemical Bond An attractive force that holds atoms together in a pure substance.
Transition Metal Groups 3-12
When an atom gains one or more electrons it acquires a _____ charge and is called a(an) _____ A) positive; anion B) negative; anion C) positive; cation D) negative; cation E) neutral; molecule
A) Manganese B) Fluorin C) Magnesium D) PhosphorusE) Tin Transitional Metal, Forms anion w/-1charge when gains electron, Non-metal from group15, Forms cation w/+2 charge when loses 2 electrons, Element from period 5
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A) Argon B)Sulfur C)Sodium D)Bromine E)Carbon Forms metallic bond Most likely to be element X in the compd K2X not likely to form a compound is a halogen One atom of this element can form up to four covalent bonds
What is the mass in grams of one atom of sodium? A) 22.99 g B) 3.82 x 10 -23 g C) 3.82 x 10 23 g D) 2.62 x 1022g E) 2.62 x 10-22g
Answer TRUE (A) or FALSE (B) The condensed structure of a methyl group is represented as –CH3. As the number of electrons in a covalent bond increases, the bond length decreases and the bond strength increases. The symbol of the smallest element in Group 17 (7A) is F. 22 - The measurement 69.17 μm can also be correctly expressed as 6.917x10-9 km.
Which of the following has the greatest mass? A) 5 moles of NaCl B) 1 kg of cotton C) 5 x 102 molecules of table sugar (C12H22 O11) D) 3.34 x 1024 molecules of water E) There is no alternative E. Do not mark E!!!!
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Which of the following sentences is/are correct? I - An atom that contains six protons is an atom of Copper. II - Sodium has 11 Only II is correct
Concerning an electron, which of the following sentences is/are correct? I - An electron adds significant mass to the atom II â I and II are incorrect
Which of the following sentences is/are correct? I – H2 is an element II – S8 is a compound Only I is correct
The elements listed below are all members of the group known as _____. argon, helium, krypton, neon, xenon noble gas
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Concerning the periodic table, which of the following sentences is/are correct? I – Magnesium and Iron are transition metal I and II are incorrect
To save energy, it is recommended that home thermostats be set at no more then 68°F in the winter months. Express this on the 20
If light travels at 3.00 X108 meters per second (m/s), how many minutes are required for light to cover the 1.5 x 1011 meters be 8.3
Concerning bonds, which of the following sentences is/are correct? I – In a covalent bond, the electrons are shared II†I and II are correct
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What is the molar mass (in g/mol) of CO2? 44.01
How the following number is corrected expressed in scientific notation? 34,100,000 3.41 x 107
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 AtomBasic unit of matter consisting of a dense, central nucleus surrounded by a cloud of negatively charged electrons.
 Atomic Numberthe number of protons identical to the charge number represented by the symbol Z In an atom of neutral charge, atomic number is equal to the number of electrons
 Balanced Equation# and type of atoms equal on both reactant and product side of equation
 Celsius temperature scaleMetric system temp scale
 Chemical BondAn attractive force that holds atoms together in a pure substance.
 Transition MetalGroups 3-12
 When an atom gains one or more electrons it acquires a _____ charge and is called a(an) _____A) positive; anion B) negative; anion C) positive; cation D) negative; cation E) neutral; molecule
 A) Manganese B) Fluorin C) Magnesium D) PhosphorusE) TinTransitional Metal, Forms anion w/-1charge when gains electron, Non-metal from group15, Forms cation w/+2 charge when loses 2 electrons, Element from period 5
 A) Argon B)Sulfur C)Sodium D)Bromine E)CarbonForms metallic bond Most likely to be element X in the compd K2X not likely to form a compound is a halogen One atom of this element can form up to four covalent bonds
 What is the mass in grams of one atom of sodium?A) 22.99 g B) 3.82 x 10 -23 g C) 3.82 x 10 23 g D) 2.62 x 1022g E) 2.62 x 10-22g
 Answer TRUE (A) or FALSE (B)The condensed structure of a methyl group is represented as –CH3. As the number of electrons in a covalent bond increases, the bond length decreases and the bond strength increases. The symbol of the smallest element in Group 17 (7A) is F. 22 - The measurement 69.17 μm can also be correctly expressed as 6.917x10-9 km.
 Which of the following has the greatest mass?A) 5 moles of NaCl B) 1 kg of cotton C) 5 x 102 molecules of table sugar (C12H22 O11) D) 3.34 x 1024 molecules of water E) There is no alternative E. Do not mark E!!!!
 Which of the following sentences is/are correct? I - An atom that contains six protons is an atom of Copper. II - Sodium has 11 Only II is correct
 Concerning an electron, which of the following sentences is/are correct? I - An electron adds significant mass to the atom II âI and II are incorrect
 Which of the following sentences is/are correct? I – H2 is an element II – S8 is a compoundOnly I is correct
 The elements listed below are all members of the group known as _____. argon, helium, krypton, neon, xenonnoble gas
 Concerning the periodic table, which of the following sentences is/are correct? I – Magnesium and Iron are transition metalI and II are incorrect
 To save energy, it is recommended that home thermostats be set at no more then 68°F in the winter months. Express this on the20
 If light travels at 3.00 X108 meters per second (m/s), how many minutes are required for light to cover the 1.5 x 1011 meters be8.3
 Concerning bonds, which of the following sentences is/are correct? I – In a covalent bond, the electrons are shared IIâ€ÂI and II are correct
 What is the molar mass (in g/mol) of CO2?44.01
 How the following number is corrected expressed in scientific notation? 34,100,0003.41 x 107
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