We can use this observation to help us write the formula of an ionic compound. Why don't libraries smell like bookstores?

These molecular compounds (covalent compounds) result when atoms share, rather than transfer (gain or lose), electrons. What does gsh stand for on the Chicago Bears jersey? (b) FeCl2 Using the periodic table, predict whether the following chlorides are ionic or covalent: KCl, NCl3, ICl, MgCl2, PCl5, and CCl4. While we can use the positions of a compound’s elements in the periodic table to predict whether it is ionic or covalent at this point in our study of chemistry, you should be aware that this is a very simplistic approach that does not account for a number of interesting exceptions. How will my inability to eat during the first trimester affect my baby? Check Your Learning (c) CaCO3 Question: Is H2SO3 an ionic or  Molecular bond  ?

(d) calcium chloride (a) A sodium atom (Na) has equal numbers of protons and electrons (11) and is uncharged. Earn Transferable Credit & Get your Degree, Get access to this video and our entire Q&A library. Question =  Is CF2Cl2 polar or  nonpolar ? (h) ammonium sulfate, (a) lithium carbonate (f) Na2O. All Rights Reserved. (f) KI. The symbol for the ion is N3−, and it is called a nitride ion. These ions, which act as discrete units, are electrically charged molecules (a group of bonded atoms with an overall charge). What percentage of alcoholics successfully complete the Salvation Army program?

The bond may result from the electrostatic force of attraction between oppositely charged ions as in ionic bonds; or through the sharing of electrons as in covalent bonds . What could cause your index finger to twitch and your wrist and hand to tingle? If it is ionic, write the symbols for the ions involved: (a) NF3 For example, sodium chloride melts at 801 °C and boils at 1413 °C. Thus, ionic compounds are electrically neutral overall, even though they contain positive and negative ions. Answer =  ICl3  (Iodine trichloride)  is  Polar What is polar and non-polar? What could cause your index finger to twitch and your wrist and hand to tingle? Thus, the periodic table can help us recognize many of the compounds that are covalent. (e) P4O6 This requires a ratio of one Ca2+ ion to two $${\text{H}}_{2}{\text{PO}}_{4}{}^{-}$$ ions. (f) silicon dioxide, (a) barium chloride By this means, a positively charged ion is formed. Check Your Learning When atoms of nonmetal elements form ions, they generally gain enough electrons to give them the same number of electrons as an atom of the next noble gas in the periodic table. (c) (NH4)2CO3

Check Your Learning Moving from the far left to the right on the periodic table, main-group elements tend to form cations with a charge equal to the group number.

What year did Halloween fall on a Saturday? Electrons, however, can be added to atoms by transfer from other atoms, lost by transfer to other atoms, or shared with other atoms. Under normal conditions, molecular compounds often exist as gases, low-boiling liquids, and low-melting solids, although many important exceptions exist. Why is Charlie having so much difficultly talking to Miss Kinnian and other people? Identify the names as ionic or covalent or acid, then write the chemical formula for the following compounds: ... NO3-1 Sulfate SO4-2 Hydroxide OH-1 Sulfite SO3-2 Nitrite NO2-1 Carbonate CO3-2 Cyanide CN-1 Phosphate PO4-3 Acetate C2H3O2-1 Ammonium NH4+1 Permanganate MnO4-1 Chlorate ClO3-1 ... calcium acetate. (e) sulfuric acid Using the periodic table, predict whether the following compounds are ionic or covalent: (a) molecular; (b) ionic; (c) molecular; (d) ionic.

(e) hydrogen fluoride Covalent bonds are the attractive forces between the positively charged nuclei of the bonded atoms and one or more pairs of electrons that are located between the atoms. There are two ways to recognize ionic compounds. Composition of Ions Check Your Learning In fact, transition metals and some other metals often exhibit variable charges that are not predictable by their location in the table. A nitrogen atom must gain three electrons to have the same number of electrons as an atom of the following noble gas, neon. Potassium Acetate is the acetate salt form of potassium, an essential macromineral. Name each of the compounds: (a) Ca(H2PO4)2 How long will the footprints on the moon last? Legal. All other trademarks and copyrights are the property of their respective owners. ), Because an ionic compound is not made up of single, discrete molecules, it may not be properly symbolized using a molecular formula. Shades of gray exist between ionic and molecular compounds, and you’ll learn more about those later. The following ionic compounds are found in common household products. Recognizing Ionic Compounds. Compounds that contain ions are called ionic compounds.

(c) potassium phosphide Ionic bonds are electrostatic forces of attraction, that is, the attractive forces experienced between objects of opposite electrical charge (in this case, cations and anions). At this point in your study of chemistry, you should memorize the names, formulas, and charges of the most common polyatomic ions.

(d) Na+, $$\ce{CO3^2-}$$ For example, perchlorate is $${\text{ClO}}_{4}{}^{-}\text{,}$$ chlorate is $${\text{ClO}}_{3}{}^{-}\text{,}$$ chlorite is $${\text{ClO}}_{2}{}^{-}$$ and hypochlorite is ClO−. If it is ionic, write the symbols for the ions involved: (a) covalent; (b) ionic, Ba2+, O2−; (c) ionic, $${\text{NH}}_{4}{}^{+}\text{,}$$ $${\text{CO}}_{3}{}^{2-};$$ (d) ionic, Sr2+, $${\text{H}}_{2}{\text{PO}}_{4}{}^{-};$$ (e) covalent; (f) ionic, Na+, O2−. What is the chemical formula for chlorine dioxide. (f) gallium phosphide Metals (particularly those in groups 1 and 2) tend to lose the number of electrons that would leave them with the same number of electrons as in the preceding noble gas in the periodic table. Sciences, Culinary Arts and Personal

Mixed Ionic/Covalent Compound Naming For each of the following questions, determine whether the compound is ionic or covalent and name it appropriately. (d) Lithium (group 1) is a metal, and carbonate is a polyatomic ion; Li2CO3 is predicted to be ionic. For each of the following compounds, state whether it is ionic or covalent, and if it is ionic, write the symbols for the ions involved: For each of the following pairs of ions, write the symbol for the formula of the compound they will form: (b) $${\text{NH}}_{4}{}^{+}\text{,}$$ $${\text{SO}}_{4}{}^{2-}$$, (a) CaS; (b) (NH4)2SO4; (c) AlBr3; (d) Na2HPO4; (e) Mg3 (PO4)2, (b) $${\text{NH}}_{4}{}^{+}\text{,}$$ $${\text{PO}}_{4}{}^{3-}$$, Predicting the Formula of an Ionic Compound, Predicting the Formula of a Compound with a Polyatomic Anion, Predicting the Type of Bonding in Compounds, Define ionic and molecular (covalent) compounds, Predict the type of compound formed from elements based on their location within the periodic table, Determine formulas for simple ionic compounds.