Iron: True-False
1. Iron has a type of bonding called metallic bonding. T
2. Iron atoms do not have a full outer shell of electrons, and this makes iron very
reactive. F
a. Iron atoms are not very reactive, reactions that iron atoms takes place are
slow steps reaction such as oxidation of iron.
3. An iron atom is silver-grey color, and so iron metal is a silver-grey color. F
a. Color is not a specific property for an atom, color is a property of whole
particles.
4. Iron can conduct electricity because some of the iron atoms can slip over their
neighbors, and move through the solid. F
5. Iron can be reshaped without changing the shape of iron atoms. T
6. The reason iron rust is that iron atoms will rust if exposed to damp air. F
a. To rust O2 and H2O vapor is needed.
7. In iron metal each atom is bonded to each of the other iron atoms surrounding it. T
8. Iron conducts electricity because iron atoms are electrical conductors. F
a. Electrons conduct electricity not atoms.
9. Iron is a solid because that is the natural state for metals. F
a. Iron atoms are held together with electrical force.
10. A metal such as iron consists of positive metal ions, and negative electrons which
move around the solid between the ions. T
11. An iron atom will reflect light, and so freshly polished iron shines. F
a. Reflection of light is a property of whole particles, not atoms.
12. The reason that iron becomes a liquid when heated is because the bonds melt. F
a. Bonds don’t melt.
13. Iron conducts electricity because it contains a sea of electrons. T
14. The atoms in a metal such as iron are held together by ionic bonds. F
a. Not ionic bonds, metallic bonds.
15. The reason iron conducts heat is because there is room between the atoms for hot air
to move through the metal. F
16. The reason that iron is hard is because iron atoms are hard. F
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17. In iron there are molecules held together by magnetism. F
a. By electrostatic forces not magnetism
18. If a metal such as iron is heated to a very high temperature it would become a gas. T
a. With really much energy maybe
19. Metals such as iron expand when heated because the atoms get bigger. T
a. The distance between atoms gets bigger.
20. Chemical bonds are needed to hold the atoms together in a metal such as iron, even
though all of the atoms are of the same type. T
Ionic Bonding: True-False
1. A positive ion will be attracted to any negative ion. T
2. A sodium ion is only bonded to the chloride ion it donated its electron to. F
3. A sodium atom can only form one ionic bond, because it only has the one electron in
its outer shell to donate. F
4. The reason a bond is formed between chloride ions and sodium ions is because an
electron has been transferred between them. F
5. In the diagram a chloride ion is attracted to one sodium ion by a bond and is
attracted to other sodium ions just by forces. F
a. Hepsi ile iyonik bağ kuruluyor, 6 tane Cl iyonu ile bağ oluşturulmuştur.
6. In the diagram each molecule of sodium chloride contains one sodium ion and one
chloride ion. F
7. An ionic bond is the attraction between a positive ion and a negative ion. T
8. A positive ion can be bonded to any neighboring negative ions, if it is close enough. T
9. Any negative ion can be attracted to any positive ion. T
10. It is possible to point to where the ionic bonds are, unless you know which chloride
ions accepted electrons from which sodium ions. F
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11. A chloride ion is only bonded to the sodium ion it accepted an electron from. F
12. A chloride atom can only form one ionic bond, because it can only accept one more
electron into its outer shell. F
13. There is a bond between the ions in each molecule, but no bonds between the
molecules. F
14. A negative ion can only be attracted to one positive ion. F
15. The reason a bond is formed between chloride ions and sodium ions is because they
have opposite charges. T
16. In the diagram a sodium ion is attracted to one chloride atom by a bond and is
attracted to other chloride ions just by forces. F
17. A positive ion can only be attracted to one negative ion. F
18. An ionic bond is when one atom donates an electron to another atom, so that they
both have full outer shells. F
19. A negative ion can be bonded to any neighboring positive ions if it is close enough. T
20. There are no molecules shown in the diagram. T
a. There is no NaCl molecule, Na+ and Cl- ions are found in the diagram.
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