CHEM-112 Week 11-20
AMA OED ANSWERAtomic Structure and Quantum Numbers
Question: Which of the following atoms has the greatest number of unpaired electrons?
Question: Which one of the following statements about orbitals is incorrect?
Question: This type of wave has certain allowable states or energies.
Question: Which one of the following statements about d orbitals is incorrect?
Question: Electrons enter the 4s sub-level before the 3d sub-level because...
Question: Quantum number that describes the average distance of the orbital from the nucleus.
Question: This quantum number gives you an idea on the shape of the electron orbital.
Question: Which one of the following statements about s orbitals is incorrect?
Question: What alternative term do you use to refer to electron clouds or the probable path of electrons?
Question: This describes the wavelike behaviour of either one electron or a pair of electrons in an atom.
Question: Smaller units that make up the sub-atomic particles of the nucleus.
Question: Particle that is approximately as heavy as a proton but is neutrally charged.
Question: What is the absolute value of the possible values for the spin quantum number of an electron?
Question: This quantum number describes how the direction of the electron along its orbit.
Electron Configurations and Periodic Trends
Question: How many valence electrons does an electrically neutral atom of lead have?
Question: Which one of the following is not the electronic configuration of atom of a noble gas?
Question: What is the electronic configuration of a sodium ion Na⁺?
Question: What is the electronic configuration of an oxide ion O²⁻?
Question: Which one of the following ions has an electronic configuration similar to argon?
Question: The electronic configuration of an atom an element with atomic number 8 is...
Question: Number of energy levels in an atom of tungsten.
Question: An atom of meitnerium has how many energy levels?
Question: How many energy levels does an atom of plutonium have?
Question: How many valence electrons does an electrically neutral atom of thallium have?
Question: Number of valence electrons in an electrically neutral atom of antimony.
Question: Which element has a larger atom: technetium or gold?
Question: Higher electronegativity: niobium or tin?
Question: Which element more easily releases an electron: technetium or indium?
Question: Higher atomic radius: chlorine or osmium?
Question: Which element has a smaller atom: zirconium or tellurium?
Question: Which element requires more energy to release an electron: copper or roentgenium?
Chemical Bonding
Question: Bond formed between a metal and a non-metal.
Question: Type of ion assumed by a metal.
Question: Type of ion assumed by a non-metal.
Question: Which of the following is a salt?
Question: Which of these compounds can conduct electricity when mixed with a solvent?
Question: What element is the cation in potassium oxide?
Question: What element is the anion in sodium selenide?
Question: Which of these compounds has a relatively high melting point?
Question: Happens to electrons in ionic bonding.
Question: Which of the following is not a salt?
Question: What type of bond can form between nitrogen and hydrogen?
Question: Which of the following is a covalent compound?
Question: Manner of bonding between two non-metals.
Question: Tendency of an atom to attract electrons in a bond.
Question: Which element is more electronegative: tin or antimony?
Question: What is the geometry of the non-polar covalent compound with no lone pairs around the central atom but has three bonding electron groups?
Organic Chemistry
Question: This type of compound always contains the carbon atom.
Question: They are organic molecules consisting entirely of carbon and hydrogen, such as methane (CH₄).
Question: Organic acids that contain a carbon atom that participates in both a hydroxyl and a carbonyl functional group.
Question: It is the simplest hydrocarbon molecule, with a central carbon atom bonded to four different hydrogen atoms.
Question: They are specific atoms, ions, or groups of atoms having consistent properties.
Question: This functional group is produced from the condensation of an alcohol with a carboxylic acid and is named based on these components.
Question: It contains a carbon-carbon double bond.
Question: The building blocks of proteins.
Question: Carbon double bonded to oxygen.
Chemical Reactions and Calculations
Question: A hydrogen electron moves with a velocity of 2.2 x 10⁶ m/s in its ground state energy level. What is the de Broglie wavelength of this particle? (x 10⁻¹⁰ m)
Question: In the burning of 1200 grams of carbon, how many grams of carbon monoxide will be produced?
Question: Consider the burning of methanol in air. If 209 grams of methanol are used up in the combustion, how much water (in grams) is produced?
Question: When 124 grams of aluminum reacts with 601 grams of Fe₂O₃, determine how many grams of Al₂O₃ are formed.
Question: How many molecules are in 3 moles of calcium tetrachloride?
Question: In a molecule of ammonia, how many percent is nitrogen?
Question: How heavy (in grams) is one molecule of ethanol?
Question: In one molecule of sodium sulfate, how many percent of it is sulfur?
Question: Suppose you want to burn 1200 grams of graphite. How much oxygen (in grams) would you need?
Question: What is the molecular mass (in grams) of calcium carbonate?
Gas Laws and Titrations
Question: How much volume (in L) will 0.20 mol hydrogen iodide at 300 K and 100.0 kPa occupy? Use R = 8.314 kPa*L/(K*mol).
Question: In a titration experiment, 500 mL of gaseous hydrochloric acid at 300 K and 100 kPa dissolved in pure water is needed to neutralize 12.5 mL of sodium hydroxide. What is the concentration of the basic solution (in mol/L)?
Question: Consider a 0.316 mole sample of nitrogen gas. If this is placed in a 4-L container at 315 K, what is the pressure (in torr) of the gas?
Question: A 60.0 liter tank of gaseous chlorine at 27°C and 125 atm suddenly had a leak. When this leak was discovered, the pressure was found to have reduced to 50 atm. Determine how many moles of chlorine escaped from the tank.
Question: Treating 50.0 mL of silver nitrate solution with excess hydrogen iodide gas produces 2.35 grams of silver iodide. Compute for the concentration (in M) of the silver nitrate solution.
Frequently Asked Questions
What is the difference between ionic and covalent bonds?
Ionic bonds involve the transfer of electrons between a metal and a non-metal, forming charged ions, while covalent bonds involve the sharing of electrons between non-metals. Chemguide provides a detailed explanation of these bonding types.
What are quantum numbers and their significance?
Quantum numbers (principal, angular momentum, magnetic, and spin) describe the energy, shape, orientation, and spin of electrons in an atom. LibreTexts Chemistry explains their role in atomic structure.
What are valence electrons?
Valence electrons are the outermost electrons of an atom that participate in chemical bonding. Their number determines an element’s reactivity. Britannica outlines their importance in chemistry.
What is electronegativity?
Electronegativity measures an atom’s ability to attract electrons in a bond. It influences bond polarity and compound properties. Khan Academy discusses its role in chemical bonding.
What are hydrocarbons and their types?
Hydrocarbons are organic compounds of carbon and hydrogen, including alkanes, alkenes, and alkynes, differing by bond types. Chemguide explains their structure and properties.
What is a functional group in organic chemistry?
A functional group is a specific group of atoms responsible for the characteristic properties of organic compounds, such as hydroxyl or carbonyl groups. LibreTexts Chemistry details their significance.