8.1 Assessment
1. A chemical bond is a force that hols two atoms together.
2. Ions form when they gain or lose an electron(s).
3. The noble gases are the elements that are relatively nonreactive because the have a stable
electron configuration and thier outmost shell is completely full.
4. The formation of a positive ions is when a atom loses an electron. A negavtive ion is formed when
is when an atom gains an electron.
2. Ions form when they gain or lose an electron(s).
3. The noble gases are the elements that are relatively nonreactive because the have a stable
electron configuration and thier outmost shell is completely full.
4. The formation of a positive ions is when a atom loses an electron. A negavtive ion is formed when
is when an atom gains an electron.
8.2 Assessment
1.An Ionic bond is the electrostatic force that holds oppositley charged particles together in an ionic
compound.
2. An ionic bond by two atoms bonding together. The atoms share an electron so that it turns into a
bond.
3. Melting Point, Boiling Point and Hardness are three physical properties.
4. Lattice Energy is the energy required to separate one mole of the ions of an ionic compounds,
which is directly related to the size of the ions bonded and is also affected by the charge of the ions.
compound.
2. An ionic bond by two atoms bonding together. The atoms share an electron so that it turns into a
bond.
3. Melting Point, Boiling Point and Hardness are three physical properties.
4. Lattice Energy is the energy required to separate one mole of the ions of an ionic compounds,
which is directly related to the size of the ions bonded and is also affected by the charge of the ions.
8.3 assessment
1. A mono-atomic ion is a one atom ion, such as Mg2+ or Br-. A Poly-atomic ion are ions made up
of more than one atom, such as Ammonium, (NH+4) and Chlorite (ClO-3).
2. 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.
3. A metal in an ionic compound is always first in the ionic compound, since they have positive ions.
Non-metals are always negatively charged, so they come next after the metals in the name and
formula. Poly-atomic ions are always negatively charges, with the exception of Ammonia, so
they are named after the non-metals.
4. An oxyanion is a poly-atomic ion that is composed of an element, usually a non-metal, bonded to
one or more oxygen atoms.
of more than one atom, such as Ammonium, (NH+4) and Chlorite (ClO-3).
2. 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.
3. A metal in an ionic compound is always first in the ionic compound, since they have positive ions.
Non-metals are always negatively charged, so they come next after the metals in the name and
formula. Poly-atomic ions are always negatively charges, with the exception of Ammonia, so
they are named after the non-metals.
4. An oxyanion is a poly-atomic ion that is composed of an element, usually a non-metal, bonded to
one or more oxygen atoms.
8.4 Assessment
1. A metallic bond is the attraction of a metallic cation for delocalized electrons.
2. When to metals are melted together, they are combined. Most metals are good conductors of
electricity.
3. An alloy is a mixture of elements that had metallic properties.
4. A Substitutional Alloy has atoms of the original metallic solid replaced by other metal atoms of
similar size. An interstitial alloy is formed when the small holes in the metallic crystal are filled
with smaller atoms.
2. When to metals are melted together, they are combined. Most metals are good conductors of
electricity.
3. An alloy is a mixture of elements that had metallic properties.
4. A Substitutional Alloy has atoms of the original metallic solid replaced by other metal atoms of
similar size. An interstitial alloy is formed when the small holes in the metallic crystal are filled
with smaller atoms.