Identifying Chemical Reactions
8 Cu + S8 → 8 CuS
Synthesis
What is a element
An element is the most simple and pure substance. The term “elements” can refer to
atoms with the same number of protons or to a substance made of a single type of atom.
Chlorine, carbon and helium are examples of elements.
Who created the first periodic table?
Dmitri Mendeleev
What are the parts that make up an atom
protons, neutrons, and electrons
What is the net force
the combination of all forces acting on an object
2 NaClO3 → 2 NaCl + 3 O2
Decomposition
What is a compound
A compound is a chemical combination of two or more different elements. In other
words, atoms that make up a compound chemically combine to form the compound. The
elements within a compound cannot be physically separated. Carbon dioxide, water and
table salt are examples of compounds.
What is the periodic law
States that the chemical and physical properties of elements are periodic functions of their atomic numbers.
What is the atomic theory
Atomic theory is the foundational scientific principle that all matter is composed of discrete, microscopic particles called atoms
An object at rest will stay at rest unless acted on by an unbalanced force. An object in motion will stay in motion at the same speed and in the same direction unless acted on by an unbalanced force.
2 C2H2 + 5 O2 → 4 CO2 + 2 H2O
Combustion
What is a molecule
A molecule is similar to a compound. It is also a chemically pure substance made of two
or more atoms bonded together. The atoms of a molecule may be the same elements or
of different elements. For example, oxygen is a molecule made of two oxygen atoms
bonded together. All compounds are molecules, but not all molecules are compounds.
metals, nonmetals, metalloids
What is a valence electron
the electrons located in the outermost shell (energy level) of an atom
What is Inertia
an object’s tendency to resist a change in motion.
2 K + 2 H2O → 2 KOH + H2
Single Replacement
What is a mixture
A mixture, unlike an element, compound or molecule, is not a pure chemical substance.
A mixture is made of two or more chemically pure substances that physically combine.
The substances within a mixture can be physically separated. Salt water, air and soil are
examples of mixtures.
What does the word Halogen mean
forms salt
What smaller particles make up protons and neutrons?
Quarks
What is Newton’s Second Law of Motion
The acceleration of an object by a force is inversely proportional to the mass of the object and directly proportional to the force.
Ca(C2H3O2)2 + Na2CO3 → CaCO3 + 2 NaC2H3O2
What is the difference between a compound and an element?
An element is a pure substance made of only one type of atom, while a compound is a substance made of two or more different elements chemically bonded together.
What family/group are the most reactive elements on the periodic table.
Alkali Metals
What is the difference between fission and fusion?
opposite physical processes that generate massive amounts of energy by manipulating atomic nuclei
What is Newton’s Third Law of Motion
For every action, there is an equal and opposite reaction.