Chapter 8 Assessment
8.1
1. A chemical bond is the force that holds two atoms together.
2. Ions form because neutral atoms become charged by losing or gaining electrons, and in some cases some atoms have a full outer shell.
3. The noble gases are unreactive, becuase they have a high ionizations charges.
4.In order for a negative ion to form, it has to gain an electron.In order for a positive ion to form, it has to lose an electron.
8.2
1. An ionic bond is an electrostatic force that holds oppositely charged particles together in an ionic compound.
2. Ionic bonds form when say Sodium Na, and Chlorine Cl form to make table salt.Atoms have to lose or gain electrons to bond together.
3. Melting Point, Boiling Point, and Hardness are all physical properties.
4.Crystal Lattice ions are arranged in a repeating, orderly, geometric patterns.
8.3
1. A monatomic ion is an atom that only has one ion. Examples: Mg2 positive, and Br negative.A Polyatomic ion is an atom that has more than one ion. Examples: Cyanide SO42 negative, and Bromate AsO43 negative.
2.Subscripts are the numbers in a compound, like H2O. H20 is made up of two hydrogen, and one oxygen atom.
3.They are named by their oxidation number.
4.A oxyanion is a polyatomic ion composed of an element, usually a nonmetal bonded to one or more oxygen atoms. They are named due to the amount of oxygen atoms present.
8.4
1.A metallic bond is an attraction of a metallic cation for delocalized electrons.
2.Metals bond in a specific way.When they bond, a lattice of positive nuclei is formed which a sea of floating electrons move in between the nuclei. This creates a very strong bond between all of the nuclei and electrons belonging to the alloy. Because of this strength, a lot of energy heat is needed to break the bond, therefore they have high melting points. Metallic bonds do not conduct heat very well.
3.An alloy is a mixture of elements that have metallic properties.
4.An interstitial alloy is formed when small holes in the metallic crystal are filled with smaller atoms. A substitutional alloy has atoms of the original metallic solid, that are replaced by other metal atoms of similar size.
1. A chemical bond is the force that holds two atoms together.
2. Ions form because neutral atoms become charged by losing or gaining electrons, and in some cases some atoms have a full outer shell.
3. The noble gases are unreactive, becuase they have a high ionizations charges.
4.In order for a negative ion to form, it has to gain an electron.In order for a positive ion to form, it has to lose an electron.
8.2
1. An ionic bond is an electrostatic force that holds oppositely charged particles together in an ionic compound.
2. Ionic bonds form when say Sodium Na, and Chlorine Cl form to make table salt.Atoms have to lose or gain electrons to bond together.
3. Melting Point, Boiling Point, and Hardness are all physical properties.
4.Crystal Lattice ions are arranged in a repeating, orderly, geometric patterns.
8.3
1. A monatomic ion is an atom that only has one ion. Examples: Mg2 positive, and Br negative.A Polyatomic ion is an atom that has more than one ion. Examples: Cyanide SO42 negative, and Bromate AsO43 negative.
2.Subscripts are the numbers in a compound, like H2O. H20 is made up of two hydrogen, and one oxygen atom.
3.They are named by their oxidation number.
4.A oxyanion is a polyatomic ion composed of an element, usually a nonmetal bonded to one or more oxygen atoms. They are named due to the amount of oxygen atoms present.
8.4
1.A metallic bond is an attraction of a metallic cation for delocalized electrons.
2.Metals bond in a specific way.When they bond, a lattice of positive nuclei is formed which a sea of floating electrons move in between the nuclei. This creates a very strong bond between all of the nuclei and electrons belonging to the alloy. Because of this strength, a lot of energy heat is needed to break the bond, therefore they have high melting points. Metallic bonds do not conduct heat very well.
3.An alloy is a mixture of elements that have metallic properties.
4.An interstitial alloy is formed when small holes in the metallic crystal are filled with smaller atoms. A substitutional alloy has atoms of the original metallic solid, that are replaced by other metal atoms of similar size.