PORTAGE CHEMISTRY 103 MODULE 1
EXAM STUDY QUESTIONS AND
ANSWERS WITH COMPLETE
SOLUTIONS WELL ELABORATED
Question: What is the correct designation for a copper atom that has lost two
electrons?
Answer: ✔️✔️ This cation is written as Cu+2 and is named Copper (II). In older
naming systems, it was often referred to as the cupric ion.
Question: How is the tin ion with a Sn+2charge identified in chemical naming?
Answer: ✔️✔️ The symbol for this ion is $ Sn+2and its systematic name is Tin
(II). It is frequently used in specialized compounds like stannous fluoride.
Question: What name and symbol are given to the higher oxidation state of tin?
Answer: ✔️✔️ When tin loses four electrons, it forms the Sn+4ion, known
officially as Tin (IV) or the stannic ion.
Question: How do you classify the lead ion commonly found in many ionic
compounds?
Answer: ✔️✔️ The ion is represented as Pb+2and is called Lead (II). Despite
being a group 14 element, this is one of lead's most stable and common
oxidation states.
Pb+4
Lead (IV)
Hg+2
,Mercury (II)
Hg2+2
Mercury (I)*
CaCl2
Calcium chloride
Al2O3
Aluminum oxide
K3P
Potassium phosphide
MnO2
Manganese (IV) oxide
PbCl2
Lead (II) chloride
Hg2I2
,Mercury (I) iodide
2. Binary Molecular Compounds
Compounds containing only two elements: a nonmetal and another nonmetal.
# prefix 1st nonmetal name # prefix 2nd nonmetal stem “ide”
The # prefixes used are:
1 = mono
2 = di
3 = tri
4 = tetra
5 = penta
6 = hexa
7 = hepta
8 = octa
9 = nona
10 = deca
BCl3
Boron trichloride
, P2O3
Diphosphorus trioxide
SF6
Sulfur hexafluoride
N2O5
Dinitrogen pentoxide
3. Non-binary Ionic Compounds
Compounds containing three or more elements: a metal and a poly-atomic group
Metal name name of poly-atomic group (no # prefixes, no “ide” suffix)
NH4+
ammonium
NO2-
nitrite
EXAM STUDY QUESTIONS AND
ANSWERS WITH COMPLETE
SOLUTIONS WELL ELABORATED
Question: What is the correct designation for a copper atom that has lost two
electrons?
Answer: ✔️✔️ This cation is written as Cu+2 and is named Copper (II). In older
naming systems, it was often referred to as the cupric ion.
Question: How is the tin ion with a Sn+2charge identified in chemical naming?
Answer: ✔️✔️ The symbol for this ion is $ Sn+2and its systematic name is Tin
(II). It is frequently used in specialized compounds like stannous fluoride.
Question: What name and symbol are given to the higher oxidation state of tin?
Answer: ✔️✔️ When tin loses four electrons, it forms the Sn+4ion, known
officially as Tin (IV) or the stannic ion.
Question: How do you classify the lead ion commonly found in many ionic
compounds?
Answer: ✔️✔️ The ion is represented as Pb+2and is called Lead (II). Despite
being a group 14 element, this is one of lead's most stable and common
oxidation states.
Pb+4
Lead (IV)
Hg+2
,Mercury (II)
Hg2+2
Mercury (I)*
CaCl2
Calcium chloride
Al2O3
Aluminum oxide
K3P
Potassium phosphide
MnO2
Manganese (IV) oxide
PbCl2
Lead (II) chloride
Hg2I2
,Mercury (I) iodide
2. Binary Molecular Compounds
Compounds containing only two elements: a nonmetal and another nonmetal.
# prefix 1st nonmetal name # prefix 2nd nonmetal stem “ide”
The # prefixes used are:
1 = mono
2 = di
3 = tri
4 = tetra
5 = penta
6 = hexa
7 = hepta
8 = octa
9 = nona
10 = deca
BCl3
Boron trichloride
, P2O3
Diphosphorus trioxide
SF6
Sulfur hexafluoride
N2O5
Dinitrogen pentoxide
3. Non-binary Ionic Compounds
Compounds containing three or more elements: a metal and a poly-atomic group
Metal name name of poly-atomic group (no # prefixes, no “ide” suffix)
NH4+
ammonium
NO2-
nitrite
