Answers ionic-bonding-and-ionic-compounds-mutiple-choice-2-2012-07-05 PDF

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Name_________________________________ Ionic Bonding & Ionic Compounds Multiple Choice Review 1) Anions tend to have a __________ charge and cations tend to have a __________ charge. A) positive, positive B) negative, negative C) positive, negative D) negative, positive Anions are negatively charged ions and cations are positively charged ions.

7) How many electrons does the Al3+ ion possess? A) 16 B) 10 C) 6 D) 0 E) 13 The aluminum atom has 13 electrons. The ion has a charge of +3 meaning that the atom has lost 3 electrons. Therefore, the ion has 10 electrons.

2) Anions tend to be __________ and cations tend to be __________. A) metals, metals B) nonmetals, nonmetals C) metals, nonmetals D) nonmetals, metals E) metalloids, metalloids Nonmetals tend to gain electrons and form anions, metals tend to lose electrons and form cations.

8) Predict the charge of the most stable ion of P A) 2+ B) 3C) 3+ D) 1E) 2Phosphorus will gain 3 electrons to form an octet.

3) When a metal and a nonmetal react, the __________ tends to lose electrons and the __________ tends to gain electrons. A) metal, metal B) nonmetal, nonmetal C) metal, nonmetal D) nonmetal, metal Nonmetals tend to gain electrons and form anions, metals tend to lose electrons and form cations. 4) __________ typically form ions with a 2+ charge. A) Alkaline earth metals B) Halogens C) Alkali metals D) Transition metals Alkaline earth metals are group 2 elements. They lose 2 electrons and have a +2 charge. 5) Aluminum forms an ion with a charge of __________. A) 2+ B) 1C) 3+ D) 2E) 0 Aluminum is metal that loses 3 electrons. The charge of the ion is +3.

6) Bromine forms an ion with a charge of __________. A) 2+ B) 3C) 1+ D) 3+ E) 1Bromine is nonmetal that gains 1 electron. The charge of the ion is -1.

9) Predict the charge of the most stable ion of S A) 3+ B) 1C) 6+ D) 2+ E) 2Sulfur will gain 2 electrons to form an octet. 10) What group in the periodic table would the fictitious  be found? element :X:

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A) Alkaline Earth metals B) Halogens C) Alkali metals D) Transition metals Element –X has 7 dots. Halogens have 7 dots representing 7 valence electrons. 11) Which of the following compounds would you expect to be ionic? A) SF6 B) H2O C) CO2 D) NH3 E) CaO Ionic compounds occur between metals and nonmetals. Ca is a metal and O is a nonmetal. 12) Which of the following compounds would you expect to be ionic? A) H2O B) CO2 C) SrCl2 D) SO2 E) H2S Ionic compounds occur between metals and nonmetals. Sr is a metal and Cl is a nonmetal. 13) Which pair of elements is most likely to form an ionic compound with each other?

A) barium, Chlorine B) calcium, sodium C) oxygen, fluorine D) sulfur, carbon E) nitrogen, hydrogen Ionic compounds occur between metals and nonmetals. Bariumis a metal and Chlorine is a nonmetal. 14) Of the choices below, which one is not an ionic compound? A) PCl5 B) CrCl6 C) RbCl D) PbCl2 E) NaCl Ionic compounds occur between metals and nonmetals. PCl 5 is not an ionic bond because phosphorus and chlorine are both nonmetals. 15) What is the formula of the compound formed between strontium ions and nitrogen ions? A) SrN B) Sr3N2 C) Sr2N3 D) SrN2 E) SrN3

Sr+2 N-3 Sr3N2 16) Magnesium reacts with a certain element to form a compound with the general formula MgX. What would the most likely formula be for the compound formed between Lithium and element X? A) Li2X B) LiX2 C) Li2X3 D) Li2X2 E) LiX MgX has a 1:1 ratio. However, since we know that there is a 1:1 ratio and the charge of Mg is +2, then the charge of X must be -2. When using the criss cross method between Li +1 and X-2 the chemical formula will be Li2X.

17) Predict the formula of the ionic compound that forms from Calcium and Fluorine. A) CaF2 B) C2F C) Ca2 F2 D) Ca2F3 E) Ca3F2 Use criss cross method between Ca+2 and F-1 18) Predict the formula of the ionic compound that forms from magnesium and fluorine. A) Mg2F3 B) MgF C) Mg2F D) Mg3F2 E) MgF2 Use criss cross method between Mg+2 and F-1 19) Element M reacts with fluorine to form an ionic compound with the formula MF 3. The M-ion has 18 electrons. Element M is __________. A) P B) Sc C) Ar D) Ca E) Cr The ratio between element M and F is 1:3. The charge of the M ion is +3 and the charge of the F ion is -1. The M atom, after losing 3 electrons, forms an ion with 18 electrons. That means the M atom had 21 electrons. Sc is element M because it has 21 electrons.

20) When calcium reacts with sulfur the compound formed is __________. A) Ca2S2 B) Ca3S2 C) CaS D) CaS2 E) Ca2S3 Use criss cross method between Ca+2 and S-2...