CHEM 1010 Exam 1 Questions with
Solved Solutions.
Compounds - Answer a pure substance that is made up of two or more different types of
atoms in a fixed, characteristic, chemical combination.
Elements - Answer is composed of many atoms of the same type.
Mixtures - Answer a mixture is a material made up of two or more different substances
which are physically combined
Periodic Table - Groups vs Periods - Answer A period is a horizontal row of the periodic table.
There are a total of 7 periods.
A group is a vertical column of the periodic table, based on the organization of the outer shell
electrons. There are a total of 18 groups.
Periodic Table - Metals/Non Metals/Metalloids locations - Answer
Periodic Table - Atomic Number (what does it mean? where can you find it?) - Answer The
atomic number is the number of protons in the nucleus of an atom.
Top right corner.
protons, neutrons, electrons - where are they in each atom? relative charges of each? - Answer
Protons - Protons and neutrons are heavier than electrons and reside in the nucleus at the
center of the atom. + 1
Neutrons - 0
Electrons - Electrons are extremely lightweight and exist in a cloud orbiting the nucleus -1
Difference between solids, liquids, gases - Answer Solids - solid, these particles are packed
closely together and are not free to move about within the substance.
Liquids - The particles in a liquid are free to flow, so while a liquid has a definite volume, it does
not have a definite shape. Liquids consist of atoms or molecules that are connected by
intermolecular bonds.
Gases - A gas is defined as a state of matter consisting of particles that have neither a defined
volume nor defined shape.
relative order and space between atoms/molecules - Answer
Solved Solutions.
Compounds - Answer a pure substance that is made up of two or more different types of
atoms in a fixed, characteristic, chemical combination.
Elements - Answer is composed of many atoms of the same type.
Mixtures - Answer a mixture is a material made up of two or more different substances
which are physically combined
Periodic Table - Groups vs Periods - Answer A period is a horizontal row of the periodic table.
There are a total of 7 periods.
A group is a vertical column of the periodic table, based on the organization of the outer shell
electrons. There are a total of 18 groups.
Periodic Table - Metals/Non Metals/Metalloids locations - Answer
Periodic Table - Atomic Number (what does it mean? where can you find it?) - Answer The
atomic number is the number of protons in the nucleus of an atom.
Top right corner.
protons, neutrons, electrons - where are they in each atom? relative charges of each? - Answer
Protons - Protons and neutrons are heavier than electrons and reside in the nucleus at the
center of the atom. + 1
Neutrons - 0
Electrons - Electrons are extremely lightweight and exist in a cloud orbiting the nucleus -1
Difference between solids, liquids, gases - Answer Solids - solid, these particles are packed
closely together and are not free to move about within the substance.
Liquids - The particles in a liquid are free to flow, so while a liquid has a definite volume, it does
not have a definite shape. Liquids consist of atoms or molecules that are connected by
intermolecular bonds.
Gases - A gas is defined as a state of matter consisting of particles that have neither a defined
volume nor defined shape.
relative order and space between atoms/molecules - Answer
