Science, Tech, Math › Science Chemical Bonds in Compounds Quiz Self-Test for Bonds, Electron Transfer, and Compounds Share Flipboard Email Take this quiz to test how well you understand chemical bonds and how ions and compounds form based on valence. DAVID MACK / Getty Images Science Chemistry Molecules Basics Chemical Laws Periodic Table Projects & Experiments Scientific Method Biochemistry Physical Chemistry Medical Chemistry Chemistry In Everyday Life Famous Chemists Activities for Kids Abbreviations & Acronyms Biology Physics Geology Astronomy Weather & Climate By Anne Marie Helmenstine, Ph.D. Anne Marie Helmenstine, Ph.D. Facebook Twitter Chemistry Expert Ph.D., Biomedical Sciences, University of Tennessee at Knoxville B.A., Physics and Mathematics, Hastings College Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. She has taught science courses at the high school, college, and graduate levels. Learn about our Editorial Process Updated on July 03, 2019 1. The electrons in a nonpolar covalent bond are: gained lost shared equally shared unequally Correct Wrong An example would be the bond between two hydrogen atoms to form hydrogen gas. 2. What is the charge on the ions formed by the alkaline earth metals? +1 +2 -1 -2 Correct Wrong The alkaline earths are the second group (column) in the periodic table. Atoms of these elements form ions with a +2 charge. Knowing the usual valence of elements in a group helps when it comes to predicting the compounds that can be formed. 3. What is the most correct name for the ionic compound formed by Fe²⁺ and Cl⁻? iron chloride iron (I) chloride iron (II) chloride iron (III) chloride Correct Wrong Transition metals can have different valences, so it's important to list the valence in a compound name. 4. What type of bonds are formed in N₂O₄ and what is the name of this compound? covalent, dinitrogen tetroxide covalent, nitrogen tetroxide ionic, nitrogen oxide ionic, dinitrogen oxide Correct Wrong Nonmetals form covalent bonds with each other. Rather than call any combination of nitrogen and oxygen "nitrogen oxide", you should specify how many atoms of each type are present. 5. The bond between sulfur (electronegativity value 2.5) and chlorine (electronegativity value 3.0) would be: not formed ionic polar covalent nonpolar covalen Correct Wrong Nonmetals form covalent bonds. Since the electronegativity values are not identical, you know it's a polar bond. 6. What is the formula for the ion which has 17 protons and 18 electrons? Cl⁺ Cl⁻ Ar⁺ Ar⁻ Correct Wrong Answer this by looking up the atomic number (number of protons) on the periodic table. The number of protons and electrons is not the same, so you're dealing with an ion. If there are more protons than electrons, there's a net positive charge. If there are more electrons than protons, it's an ion with a negative charge. 7. Ionic compounds may contain polyatomic ions. For example, the formula of magnesium nitrate is: MgNO₃ Mg₂NO₃ Mg(NO₃)₂ Mg₂(NO₃)₃ Correct Wrong Polyatomic ions are groups of atoms bound together that act as a cation or anion to form bonds and make compounds. To answer this question, you need to know the formula of a nitrate. 8. What is the formula of phosphorus trichloride? KCl KCl₃ P₃Cl PCl₃ Correct Wrong The tri- prefix in the name means "three". 9. How many electrons are gained/lost by magnesium and what is the charge on the ion that it forms? loses 2 electrons to form a magnesium ion with a 2- charge gains 2 electrons to form a magnesium ion with a 2- charge loses 2 electrons to form a magnesium ion with a 2+ charge gains 2 electrons to form a magnesium ion with a 2+ charge Correct Wrong Magnesium and other alkaline earth atoms form cations with a 2+ charge. To get that positive charge, you need 2 more protons than electrons. 10. The electron-dot structure of carbon has how many dots? 2 4 6 8 Correct Wrong The electron dot diagram shows how many lone electron pairs are present, which is similar to the valence on the atom. Chemical Bonds in Compounds Quiz You got: % Correct. Kind of Clueless About Chemical Bonds Andrew Brookes / Getty Images You're on track to learn more about chemical bonds and how they work. Your biggest friend when it comes to understanding chemical bonding is the periodic table because it's organized to group elements with similar charges together (for example, all of the alkali metals carry a +1 charge). Electronegativity is a periodic table trend. Atoms with the same electronegativity form nonpolar covalent bonds. Atoms with similar but not identical electronegativity (two different nonmetals) form polar covalent bonds. When the electronegativity difference is large (think metals with nonmetals), you get ionic bonds. When you balance chemical formulas, remember the electrical charges cancel out. So, if you have two positive charges, you form a neutral compound if it bonds with two negative charges. From here, you might want to review the types of chemical bonds and how chemical formulas work. If you're ready for another quiz, see if you understand the basics about atoms and their parts. Share Your Results Share Flipboard Email Chemical Bonds in Compounds Quiz You got: % Correct. Competent With Chemical Bonding ROGER HARRIS/SCIENCE PHOTO LIBRARY / Getty Images Bravo! You understand how chemical bonds form and how electrons are transferred or shared to form ions and compounds. If you're ever in doubt about the type of bonds formed between atoms, look at their position on the periodic table. Atoms with the same electronegativity (like two oxygen atoms) form nonpolar covalent bonds. Atoms with close electronegativity values (like two nonidentical nonmetals) form polar covalent bonds. If the electronegativity difference is large (between a metal and a nonmetal) then ionic bonds form. From here, you can test yourself to see if you know the trends in the periodic table or you might wish to review the types of chemical bonds. If you're ready for another quiz, find out which type of mad scientist you are or you can practice naming ionic compounds. 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