Chem-102-5585 Final Flash Cards

76 neutrons
~128 - 52 protons = 76 neutrons
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76 neutrons
~128 - 52 protons = 76 neutrons
How many neutrons are in a Te (Tellurium) atom with a mass number of 127.60 (128) and an atomic number of 52?
23 protons, 23 electrons and 28 neutrons
Atomic number = protons & electrons
~51 - 23 = 28 neutrons
How many protons, neutrons, and electrons are in a V (Vanadium) atom with a mass number of 50.942 (51) and an atomic number of 23?
Atomic/ionic radii size increases going DOWN and to the LEFT.
What is the trend for atomic/ionic radii on the periodic table?
Ba (Barium)
The atomic/ionic radii increases moving LEFT and DOWNWARDS on the periodic table.
Which has the larger atomic radii, Ru (Ruthenium) or Ba (Barium)?
Image: Ba (Barium) The atomic/ionic radii increases moving LEFT and DOWNWARDS on the periodic table.
Hg (Mercury)
Hg (Mercury) is directly below Zn (Zinc) on the periodic table, therefore its atomic/ionic radii is larger.
Which has the larger ionic radii, Zn (Zinc) or Hg (Mercury)?
Image: Hg (Mercury) Hg (Mercury) is directly below Zn (Zinc) on the periodic table, therefore its atomic/ionic radii is larger.
Tl (Thallium)
As (Arsenic) falls along the metalloids line on the periodic table, while Tl (Thallium) is on the other side of that line in the Post-Transition metals group.
Which element is more metallic in nature, As (Arsenic) or Tl (Thallium)?
Image: Tl (Thallium) As (Arsenic) falls along the metalloids line on the periodic table, while Tl (Thallium) is on the other side of that line in the Post-Transition metals group.
Si (Silicon)
S (Sulfur) falls in the Reactive non-metals group whereas Si (Silicon) lies in the metalloids group.
Which element is more metallic in nature, S (Sulfur) or Si (Silicon)?
Image: Si (Silicon) S (Sulfur) falls in the Reactive non-metals group whereas Si (Silicon) lies in the metalloids group.
Electronegativity increases going UP and to the RIGHT.
What is the trend for electronegativity on the periodic table?
Ga (Gallium)
Electronegativity increases UPWARD and to the RIGHT on the periodic table.
Which element has a higher electronegativity, Cs (Caesium) or Ga (Gallium)?
Image: Ga (Gallium) Electronegativity increases UPWARD and to the RIGHT on the periodic table.
Zn (Zinc)
Zn (Zinc) is directly to the right of Fe (Iron), so its electronegativity is higher.
Which element has a higher electronegativity, Fe (Iron) or Zn (Zinc)?
Image: Zn (Zinc) Zn (Zinc) is directly to the right of Fe (Iron), so its electronegativity is higher.
Green lightWhich has a longer wavelength, green light or violet light?Red lightWhich has a longer wavelength, red light or blue light?Radio wavesWhich has a longer wavelength, x-rays or radio waves?Gamma raysWhich has more energy, gamma rays or ultra-violet light?Cyan lightWhich has more energy, cyan light or yellow light?K.E = (6.623 × 10−³⁴ J•s) (2.16 × 10²² s−¹) - (8.034 × 10−¹⁹ J) = 1.43 × 10−¹¹ JK.E = hv - ⨂ h = Planck's Constant; v = frequency, ⨂ = work function What is the kinetic energy of an electron ejected from a piece of metal whose work function is 8.034 × 10−¹⁹ J when a photon with a frequency of 2.16 × 10²² s−¹ hits it? h = 6.6523 × 10−³⁴ J•sK.E = (6.623 x 10−³⁴ J∙s) (1.75 x 10²¹ s−¹) - (1.017 x 10−¹⁸ J) = 1.16 x 10−¹² JK.E = hv - ⨂ h = Planck's Constant; v = frequency, ⨂ = work function Calculate the kinetic energy of an electron ejected from a piece of metal whose work function is 1.017 x 10−¹⁸ J when a photon with frequency 1.75 x 10²¹ s−¹ hits it. h = 6.623 x 10−³⁴ J∙s1s² 2s² 2p⁴ 2 missing pairs of electrons Since the last subshell, 2p⁴, is not full, the 4 electrons only fill up one orbital, leaving two unpaired electrons.What is the electron configuration of O (Oxygen)? How many missing pairs of electrons are there?[Ar] 3d⁴ or 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁴ 4 missing pairs of electrons Since the last subshell, 3d⁴, is not full, the 4 electrons do not fill up any of the orbitals, leaving all four of the electrons unpaired.What is the electron configuration of Mn³+ (Manganese)? How many missing pairs of electrons are there?n = 3 , l = 0 , ml = 1 , ms = 1/2 Since l is 0, ml can't be anything other than 0.Out of the three sets of quantum numbers, state which one is false. n = 2 , l = 1 , ml = -1 , ms = -1/2 n = 3 , l = 0 , ml = 1 , ms = 1/2 n = 2 , l = 1 , ml = 0 , ms = -1/2n = 2 , l = 1 , ml = 0 , ms = -1/2 The electron configuration for F (Fluorine) ends with 2p⁵, so n = 2. Since it is in the p orbital l = 1. This then means that ml varies between -1, 0 and 1, but when ordering the electrons the fifth electron ends up in the 0 space, making ml = 0. Since the fifth electron ends up pointing downward, this makes ms = -1/2.What is the quantum number configuration of F (Fluorine)?Atomic Mass = (0.4572 × 72.956) + (0.5428 × 74.983) = 74.06 amuAtomic Mass = ∑(%/100 × isotope mass) Calculate the average atomic mass of an unknown element that has two natural isotopes, ⁷³X (45.72% abundance, 72.956 amu) and ⁷⁵X (54.28% abundance, 74.983 amu).45 - 21 protons = 24 neutrons 21 - (+3) = 18 electrons 21 protons + 18 electrons + 24 neutrons = 63 particlesHow many subatomic particles are in ⁴⁵Sc³+?75 - 33 protons = 42 neutrons 33 - (-2) = 35 electrons 33 protons + 35 electrons + 42 neutrons = 110 particlesHow many subatomic particles are in ⁷⁵As²−?Te - O O is further from Te than N is from F, making it more polar of a bond.Which of the bonds is the most polar, N - F or Te - O?C - N N is directly next to N, making it much less polar than the other bonds.Which of these bonds is the LEAST polar, Pt - Hg, Mg - Ra or C - N?HF Fluorine is more electronegative, meaning HF has a stronger dipole.Which molecule has the higher boiling point? (Intermolecular forces) HF or HICH₃Cl O₂ is a Van der Waals bond (weak) and CH₃Cl is a dipole-dipole bond (strong)Which molecule has the higher vapor pressure? (Intermolecular forces) O₂ or CH₃ClNaCl H₂O is a dipole-dipole bond (weaker) and NaCl is an ion-ion bond (strongest)Which molecule has the higher boiling point? (Intermolecular forces) H₂O or NaClAr Ar is a larger atom, making its Van der Waals bond stronger than HeWhich molecule has the higher viscosity? (Intermolecular forces) He or ArA mixtureIs orange juice an element, a compound or a mixture?An compoundIs H₂O an element, a compound or a mixture?0 ℃ ExothermicLooking at the phase diagram for water, at 1 atm, what temperature does liquid water turn to ice? Is this endothermic or exothermic?100 ℃ EndothermicLooking at the phase diagram for water, at 1 atm, what temperature does liquid water turn to water vapor? Is this endothermic or exothermic?sp² Trigonal planar Bent (Excess pair of electrons causes it to be a bent trigonal planar)What is the hybridization of the central atom for SO₂? Then what is the electron domain geometry and molecular geometry?sp³d Trigonal Bipyramidal (90° & 120°)What is the hybridization of the central atom for PCl₅? What are the bond angles?5 σ and 1 πHow many sigma σ and pi π bonds are in C₂H₄?4 σ and 2 πHow many sigma σ and pi π bonds are in SO₂Cl₂?Sigma σ bonds are only able to rotate around the bondAre sigma σ bonds or pi π bonds able to rotate around the bond?On the axis between the two nucleiWhere is electron density concentrated in a sigma σ bond?Above and below the axis between two nucleiWhere is electron density concentrated in a pi π bond?Bisethylenediaminedinitroferrate (III) sulfateWhat is the name of [Fe(en)₂(NO₂)₂]₂SO₄?Potassium tetrachloroplatinate (II)What is the name of K₂[PtCl₄]?[Pt(H₂O)(CO₃)]BrWhat is the formula for aquatricarbonylplatinum (II) bromide?[Pt(NH₃)₃Br]ClWhat is the formula for triaminebromoplatinnum (II) chloride?0.0154g × 72.64 mol/g × (6.022e23 atoms/mol) = 1.27₆ × 10²⁰ atoms Gemol × Avogadro's = atoms How many atoms come from 0.0154g of Ge (Germanium)?3 4Al + 3O₂ = 2Al₂O₃What coefficient will be in front of O₂ when the following equation is balanced? Al + O₂ → Al₂O₃2 CS₂ + 3O₂ → CO₂ + 2SO₂What coefficient will be in front of SO₂ when the following equation is balanced? CS₂ + O₂ → CO₂ + SO₂2 K₂CrO₄ + Pb(NO₃)₂ → 2KNO₃ + PbCrO₄What coefficient will be in front of KNO₃ when the following equation is balanced? K₂CrO₄ + Pb(NO₃)₂ → KNO₃ + PbCrO₄1.84 M 3.14 mol ÷ 5.12 L = 0.613₂ M 3(0.613₂ M) = 1.84 MWhat is the concentration of NO₃− in a solution prepared by dissolving 3.14 moles of Al(NO₃)₃ in enough water to make 5.12 L of solution?60.2 mL (250.0 mL)(0.222 M) / (0.922 M) = 60.2 mLHow many mL of a 0.922 M aqueous solution of KNO₃ is required to make 250.0 mL of a solution of KNO₃ that is 0.222 M?-4500 kJ × (2 mol Fe₂O₃/-1652 kJ) × (159.7 g/mol Fe₂O₃) = 870 g Fe₂O₃Given the following equation, how many grams of Iron (III) Oxide will be produced if 4500 kJ of heat energy is released? 4Fe + 3O₂ → 2Fe₂O₃ ΔH = -1652 kJ500 kg × (1000 g/1 kg) × (mol C₃H₈/44.094 g) × (-2221 kJ/mol C₃H₈) = 2.52 × 10⁷ kJGiven the following reaction, how much energy in kJ will be released if 500 kg of propane is burned? C₃H₈ + 5O₂ → 3CO₂ + 4H₂O ΔH = -2221 kJ