CHEM 103 UPDATED CORRECT QUESTIONS AND
ANSWERS SURE A+
✔✔John Dalton(English 1766-1844) - ✔✔-Father of modern Atomic Theory
based on experimental evidence with gases
✔✔Dalton Atomic Particulate Model Of Matter - ✔✔-All matter is made up of tiny
particles called atoms.
-Unique types of atoms are called elements.
-Molecules are collections of bonded atoms.
-Compound is general term that includes molecules, atoms and ions (atoms not having
normal number electrons).
-Compounds have a fixed ratio of atoms.
-Chemical reactions do not create or destroy atoms.
-Chemical reactions can create or destroy compounds.
✔✔Chemical View of the Atom - ✔✔-Nucleus is the center containing protons (+) and
neutrons (o). Electrons (-) are on the outside.
-Atomic number = number of protons, which defines element.
-Atomic mass = mass of protons and mass of neutrons.
-Number of electrons = number of protons in neutral atom.
-Neutron mass = proton + electron.
✔✔Elements - ✔✔-Elements are pure substances made up of homoatomic molecules
or individual atoms of the same kind.
Examples are oxygen gas made up of homoatomic molecules, O2, and copper metal
made up of individual copper atoms.
✔✔Compounds - ✔✔-Compounds are pure substances that are made up of atoms
bonded to form heteroatomic molecules or individual (ions) of two or more different
kinds of atoms.
, Examples: pure water made up of heteropolyatomic molecules and table salt made up
of sodium ions and chlorine ions. Technically, Ionic compounds are not molecules.
✔✔Heterogeneous mixture - ✔✔Fruit salad, pizza, wood, chicken rice soup, etc
✔✔Homogeneous mixture - ✔✔Sugar water, gasoline, gold alloy, etc
✔✔Measurements - ✔✔consist of two parts, a number and a unit or label such as feet,
pounds or gallons
-measurement units are agreed upon by those making using the measurements
-Measurements are made using measuring devices (e.g. rulers, balances, graduated
cylinders, etc.).
-Some containers are double labeled: vinegar: 32 fl oz, (1 Qt), 946 ml.
✔✔The Metric System of Measurement - ✔✔-The metric system is a decimal system in
which larger and smaller units are related by factors of 10.
-Meter was defined as 1/10,000,000 th of the distance from North Pole to the equator.
✔✔Types of metric system units - ✔✔Basic or defined units [e.g. 1 meter (1 m)] are
used to calculate derived units [e.g. 1 square meter (1 m2)].
✔✔The use of prefixes - ✔✔Prefixes are used to relate basic and derived units
✔✔Mega - ✔✔M
1,000,000 x basic unit
10^6 x basic unit
✔✔Kilo - ✔✔K
1000x basic unit
10^3 x basic unit
✔✔deci - ✔✔d
1/10 x basic unit
10^-1 x basic unit
✔✔Centi - ✔✔c
1/100 x basic unit
10^-2 x basic unit
✔✔Milli - ✔✔m
1/1000 x basic unit
10^-3 x basic unit
✔✔Micro - ✔✔µ
1/1,000,000 x basic unit
ANSWERS SURE A+
✔✔John Dalton(English 1766-1844) - ✔✔-Father of modern Atomic Theory
based on experimental evidence with gases
✔✔Dalton Atomic Particulate Model Of Matter - ✔✔-All matter is made up of tiny
particles called atoms.
-Unique types of atoms are called elements.
-Molecules are collections of bonded atoms.
-Compound is general term that includes molecules, atoms and ions (atoms not having
normal number electrons).
-Compounds have a fixed ratio of atoms.
-Chemical reactions do not create or destroy atoms.
-Chemical reactions can create or destroy compounds.
✔✔Chemical View of the Atom - ✔✔-Nucleus is the center containing protons (+) and
neutrons (o). Electrons (-) are on the outside.
-Atomic number = number of protons, which defines element.
-Atomic mass = mass of protons and mass of neutrons.
-Number of electrons = number of protons in neutral atom.
-Neutron mass = proton + electron.
✔✔Elements - ✔✔-Elements are pure substances made up of homoatomic molecules
or individual atoms of the same kind.
Examples are oxygen gas made up of homoatomic molecules, O2, and copper metal
made up of individual copper atoms.
✔✔Compounds - ✔✔-Compounds are pure substances that are made up of atoms
bonded to form heteroatomic molecules or individual (ions) of two or more different
kinds of atoms.
, Examples: pure water made up of heteropolyatomic molecules and table salt made up
of sodium ions and chlorine ions. Technically, Ionic compounds are not molecules.
✔✔Heterogeneous mixture - ✔✔Fruit salad, pizza, wood, chicken rice soup, etc
✔✔Homogeneous mixture - ✔✔Sugar water, gasoline, gold alloy, etc
✔✔Measurements - ✔✔consist of two parts, a number and a unit or label such as feet,
pounds or gallons
-measurement units are agreed upon by those making using the measurements
-Measurements are made using measuring devices (e.g. rulers, balances, graduated
cylinders, etc.).
-Some containers are double labeled: vinegar: 32 fl oz, (1 Qt), 946 ml.
✔✔The Metric System of Measurement - ✔✔-The metric system is a decimal system in
which larger and smaller units are related by factors of 10.
-Meter was defined as 1/10,000,000 th of the distance from North Pole to the equator.
✔✔Types of metric system units - ✔✔Basic or defined units [e.g. 1 meter (1 m)] are
used to calculate derived units [e.g. 1 square meter (1 m2)].
✔✔The use of prefixes - ✔✔Prefixes are used to relate basic and derived units
✔✔Mega - ✔✔M
1,000,000 x basic unit
10^6 x basic unit
✔✔Kilo - ✔✔K
1000x basic unit
10^3 x basic unit
✔✔deci - ✔✔d
1/10 x basic unit
10^-1 x basic unit
✔✔Centi - ✔✔c
1/100 x basic unit
10^-2 x basic unit
✔✔Milli - ✔✔m
1/1000 x basic unit
10^-3 x basic unit
✔✔Micro - ✔✔µ
1/1,000,000 x basic unit
