Ionic and Covalent Bonding Quiz Review 1. Compare ionic and covalent bonds by completing the chart below. Types of Elements Ionic Metals and NonMetals Covalent Electrons are: Transferred Shared Are the atoms an ion? YES!!!! NOOO Non-metals and Non-metals 2. How does electronegativity play a role in ionic bonding? In ionic bonding the more electronegative element (non-metal) will pull and electron off of the metal. The non-metal has a negative charge and becomes an anion while the metal gains a positive charge and becomes a cation. The attraction between the positive ion and negative ion forms the ionic bond. 3. What is a cation and anion? Cation- positive….. PAWsitive Anion- negative 4. How are cations and anions formed in ionic bonding? Ionic: Non-metal pulls electron off metal. Non-metal gains electron becoming negative (anion) and metal loses an electron becoming positive (cation) Covalent: more negative element pulls the electrons toward its side, forming the negative side of the bond 5. Draw a dot structure for calcium and sulfur. Show the charge, formula, and name the compound. Will do in class…. 6. What are the rules for naming ionic compounds? Metal goes first, add “ide” to end of non-metal. If the metal is a transition metal you must include a roman numeral to show the number of valence electrons on one atom of the transition metal. 7. Explain what happens when sodium bonds to chlorine. How do the two bond and what is the name of the compound? In class… 8. What is the difference between the electrons in ionic and covalent bonds? Ionic bonds electrons are transferred Covalent bonds electrons are shared 9. When an atom loses an electron it becomes a: Cation- positive 10. What are the rules to naming covalent bonds? Put PREFIX to show how many atoms of element are present. The non-metal that comes first going from left to right across periodic table goes first in the name. Then add “ide” to the end of the second non-metal. 11. What does the oxidation number tell you? # of valence electrons 12. What is the chemical formula for calcium bromide? Sodium nitride? Aluminum oxide? In class… 13. Why do elements bond? To become stable…they want 8 valence electrons in valence shell 14. Name the following N2S3 ? What type of bond is this? Dinitrogen Trisulfide…covalent 15. What is the formula for calcium fluoride? What type of bond is this? CaF2….ionic bond 16. What is the chemical formula for magnesium nitride? What type of bond is this? Mg3N2 Ionic bond 17. Name this compound, CaCl2. Is it ionic or covalent? Calcium chloride….ionic 18. What is the name of PbBr2? In class… Lead (II) Bromide 19. What is the formula for Titanium (III) Chloride? What is the charge of an atom of titanium? TiCl3…the charge on a Ti atom is +3 because it lost 3 electrons 20. What type of bond would Oxygen and Nitrogen form? They are both non-metals so covalent!!!!!!!! Heads Up! Remember Hydrogen is a non-metal as well!!!! 21. CO is carbon monoxide, in this bond the electrons are: Shared 22. C6H12O6 is the formula for glucose, what type of bond holds this molecule together? How many atoms of oxygen, hydrogen and carbon are there? How many elements are in this molecule? Covalent 6 atoms of oxygen 12 atoms of hydrogen 6 atoms of carbon 3 elements, oxygen, hydrogen, and carbon 23. What is the oxidation number for halogens? Alkali metals? Halogens : -1 Alkali metlas: +1 24. In a chemical bond what is shared? electrons 25. Name the following or write the formula: NaBr Sodium bromide C4O2 Tetracarbon dioxide Nitrogen Dichloride NCl2 PF3 Phosphorus Trifluoride Properties of Matter: 1. What are the classifications of matter for pure substances? Describe each and give an example. Pure: Elements and compounds: sodium, Water Impure: Mixtures: salad, sand and water 2. What are the classifications of matter for impure substances? Describe each and give an example. Homogeneous Mixture: same consistency: milk Heterogeneous: not the same consistency: salad, sand and water
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