E. distorted tetrahedron (seesaw). 61. According to VSEPR theory, which one of the following molecules is trigonal bipyramidal? A. SF4 B. XeF4 C. NF3 D. SF6 E. PF5 62. Which one of the following molecules has tetrahedral geometry?
Unit 2 ( Isotopes Problem Set 2-2 1. Which of the following are isotopes of element X, with atomic number of 9: [pic],[pic],[pic], and [pic]. 2. For each of the following isotopes, write the nuclear symbols: a. Cu-63, Cu – 65 b. C-12, C-14 c. Mg-24, Mg-25, Mg-26 d. Ne-20, Ne-21, Ne-22 3. Verify that the atomic mass of magnesium is 24.31 amu, given the following information: [pic], mass = 23.985042 amu; percent abundance = 78.99% [pic], mass = 24.985837 amu; percent abundance = 10.00% [pic], mass = 25.982593 amu; percent abundance = 11.01% 4.
SCH 4U1 FINAL EXAM REVIEW ATOMIC STRUCTURE AND MOLECULAR ARCHITECTURE 1. Describe the wave mechanical model of the atom. 2. Write the ground state electron configuration for Br. 3.
2 marks 4 Draw the structural formula of Compound G. 1 mark 5 Using the chemical shift correlation for 13C NMR, predict the number of peaks for Compound G and draw in the position of the peaks on the blank spectrum below, annotating each peak with its corresponding structure. (2 marks) 6 Draw the structural formula for 2-chloro but-2-ene. Below this draw a structural formula of an isomer of 2-chloro but-2-ene and name this substance.
1.23 C. 5.74 X 10-4 D. 0.658 _____ 14. Which of the following is true for the following voltaic cell? Zn (s) ( Zn2+(aq) (( Cr3+ (aq) ( Cr (s) A. The electrons flow from cathode to the anode. B.
Chemistry chapter 6.3 1) a. Cation b. Electrostatic forces 2) Ionic bond between metal and oxygen, the metals conduct electricity in a solid state using delocalised electrons. They are coated with a special kind of plastic e.g. Copper. 3) When they contain 8 valance electrons. 4) When naming an ionic compound, which ion is given first?
A) S B) Cl C) S2O32- D) ClO- 32. What is the oxidation number of Cl in ClO-? A) +1 B) +4 C) +2 D) -1 E) 0 33. What is the oxidation number of S in SO42-? A) +12 B) +4 C) +6 D) -2 E) 0 34.
Name___________________________ Period_________________ Chemical Bonds Review Sheet Part one Write the definitions for each of the following terms. Octet rule Cation Anion Ionic compound Monatomic ion Covalent bond Molecular compound Nonpolar covalent bond Polar covalent bond Single bond Double bond Triple bond Part 2 1. Which has a greater potential energy, a noble gas or a metal? Explain your answer. ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ 2.
* Avogadro’s constant: The number of toms per mole is called the Avogadro’s constant. It has a value of 6.02x10^23. * Relative atomic mass: The relative atomic mass of an element is the average mass of one atom of the element relative to 1/12th the mass of one atom of carbon-1 (Ar), On a scale
of Glycine is 75g/mol)? 1% of Glycine = 1g/100mL 1g x (1 mol/75g) = 0.0133mol M = mol/L 0.0133mol/0.1L = 0.133M 12) Identify the amino acid in the chemical structure below, as well as the “R” group, and describe the polarity and charge characteristics. 1. Glutamic acid; carboxylic group side chain; polar negatively charged 2. Histidine; imidazole group side chain; polar positively charged 3.