Ions quiz #7 Flashcards
Ions quiz #7
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When a neutral atom gains one or more electrons, what does it become? It becomes a negatively charged ion (anion). What charge did the sodium ions always have when in a salt compound? Sodium ions always have a +1 charge. What charge did the chloride ions always have when in a salt compound? Chloride ions always have a -1 charge. Which of the following compounds consist of ions? Ionic compounds, such as NaCl, consist of ions. Which of the following ions would be colored in solution? Transition metal ions, such as Cu2+, are often colored in solution. What element is used to dope an n-type semiconductor? Phosphorus is commonly used to dope n-type semiconductors. What type of element is most likely to form an anion? Nonmetals are most likely to form anions. What is the most stable monatomic ion formed from nitrogen? N3- is the most stable monatomic ion of nitrogen. If an element loses an electron and becomes a cation, what happens to its charge? Its charge becomes positive. Does the formation of a cation involve gain of electrons or loss of electrons? Formation of a cation involves loss of electrons. Which of the following would be a negative ion with a single charge? Cl- is a negative ion with a single charge. The total oxide ion charge in a formula unit of CoO is 2-. What is the charge on each cobalt ion? Each cobalt ion has a +2 charge. What are the ions in sodium chloride? Na+ and Cl- are the ions in sodium chloride. What is the correct formula for a potassium ion with 18 electrons? K+ has 18 electrons. Which ion does not have a noble gas configuration in its ground state? Transition metal ions often do not have noble gas configurations. The total oxide ion charge in a formula unit of MnO is 2-. What is the charge on each manganese ion? Each manganese ion has a +2 charge. Which atom has the same number of electrons as a P3- ion? Argon (Ar) has the same number of electrons as P3-. Which of the following ions will act as a weak base in water? The hydroxide ion (OH-) acts as a weak base. What type of atoms form negative ions? Nonmetal atoms form negative ions (anions). How many electrons does the atom need in its shell to be stable? Most atoms need 8 electrons in their valence shell to be stable (octet rule). What is the ionic charge of an ion with 13 protons and 10 electrons? The charge is +3. What is the name of a positive ion? A positive ion is called a cation. What is the charge on the ion formed by Na? Na forms a +1 ion. When metals lose electrons and become cations, what happens to their charge? Their charge becomes positive. Since Na is now positively charged, what is it called? It is called a sodium cation (Na+). What happens when potassium forms an ion? Potassium loses one electron to form K+. Which term describes a negative ion? A negative ion is called an anion. How many electrons would be in a -2 charged anion of sulfur? S2- has 18 electrons. How many electrons does O2- have? O2- has 10 electrons. How are positive ions formed? Positive ions are formed by losing electrons. Which of the following happens when chlorine forms an ion? Chlorine gains one electron to form Cl-. When chlorine gains an electron, does it have a more positive or negative charge? It has a more negative charge. Which two particles have opposite charges? Protons and electrons have opposite charges. Which ion would bond with a calcium ion (Ca2+) to form a neutral ionic compound? An ion with a -2 charge, such as SO4^2-, would bond with Ca2+. An ion has 26 protons. What is its identity? It is an iron ion (Fe). What charge do cations have? Cations have a positive charge. Which ion is a cation? Na+ is a cation. An atom has 26 protons and 24 electrons. What is its charge? It has a +2 charge. What is the ratio of sodium to chloride ions in NaCl? The ratio is 1:1. What is the charge on the Cr in the ionic compound Cr2O3? Each Cr ion has a +3 charge.
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