Assessments
8.1
1. An attraction between atoms that allows the formation of chemical substances of two or more atoms.
2. They form when they gain or lose electrons.
3. Group Vlll (Noble Gas's), because they are stable.
4. Negative Ions are formed when a neutral atom gains one or more electrons.
Positive Ions are formed when a neutral atom loses one or more valence electrons.
8.2
1. Is a type of chemical bond formed through and electrostatic attraction between two oppositely charged ions.
2. If it gains or loses an electron.
3. Melting point, boiling point and hardening
4. It comes in many forms, simple cubic, body centered cubic, base centered cubic, face centered cubic, hexagonal close packing, ect...
8.3
1. Monatomic ion is a one-atom ion....Mg2+, Polyatomic is made up of more then one atom...ammonium2. When more than one atom of a specific element is found in a molecule, a subscript is used to indicate this in the chemical formula. For example, in water, H2O, there are two molecules of hydrogen and one molecule of oxygen.
3. Metals are always positive so they come first, non metals are sometimes negative sometimes positive so they come next, the polyatomic are almost always negative so they come last.4. Oxyanion is a polyatomic ion composed usually of a nonmetal and bonded to one or more oxygen atoms. It's name is based on the number of oxygen atoms in the ion.8.41. Metallic bond is the attraction of a metallic cation for delocalized electrons.2. Metals bond in a specific way. When they bond, a lattice (think of a 3-D cube) of positive nuclei is formed with a "sea" of floating electrons moving in between the nuclei. This creates a VERY strong bond between all of the nuclei and electrons of the alloy. Because of this strength, a lot of energy (heat) is needed to break the bond, therefore they have high melting points. 3. An alloy is a mixture of elements that has metallic properties.
4. A substitutional alloy has atoms of the original metallic solid replaced by the other metal atoms of similar size, and interstitial alloy is formed when the small oles in a metallic crystal are filled with smaller atoms.
1. An attraction between atoms that allows the formation of chemical substances of two or more atoms.
2. They form when they gain or lose electrons.
3. Group Vlll (Noble Gas's), because they are stable.
4. Negative Ions are formed when a neutral atom gains one or more electrons.
Positive Ions are formed when a neutral atom loses one or more valence electrons.
8.2
1. Is a type of chemical bond formed through and electrostatic attraction between two oppositely charged ions.
2. If it gains or loses an electron.
3. Melting point, boiling point and hardening
4. It comes in many forms, simple cubic, body centered cubic, base centered cubic, face centered cubic, hexagonal close packing, ect...
8.3
1. Monatomic ion is a one-atom ion....Mg2+, Polyatomic is made up of more then one atom...ammonium2. When more than one atom of a specific element is found in a molecule, a subscript is used to indicate this in the chemical formula. For example, in water, H2O, there are two molecules of hydrogen and one molecule of oxygen.
3. Metals are always positive so they come first, non metals are sometimes negative sometimes positive so they come next, the polyatomic are almost always negative so they come last.4. Oxyanion is a polyatomic ion composed usually of a nonmetal and bonded to one or more oxygen atoms. It's name is based on the number of oxygen atoms in the ion.8.41. Metallic bond is the attraction of a metallic cation for delocalized electrons.2. Metals bond in a specific way. When they bond, a lattice (think of a 3-D cube) of positive nuclei is formed with a "sea" of floating electrons moving in between the nuclei. This creates a VERY strong bond between all of the nuclei and electrons of the alloy. Because of this strength, a lot of energy (heat) is needed to break the bond, therefore they have high melting points. 3. An alloy is a mixture of elements that has metallic properties.
4. A substitutional alloy has atoms of the original metallic solid replaced by the other metal atoms of similar size, and interstitial alloy is formed when the small oles in a metallic crystal are filled with smaller atoms.