Atomic Structure Review
• How many Electrons does Chlorine (Cl) have?
• How many Neutrons does Chlorine (Cl) have?
• How many Protons does Chlorine (Cl) have?
•Who proposed electrons travel around the
nucleus of an atom in definite paths or
“orbits”?
• Who stated the atom was “neutral” in charge?
(Hint: He experimented using a “Cathode Ray
Tube”)
• What do you call atoms of the same element
which contain different numbers of neutrons?
• Which particle in the atom has a positive
charge?
• Who proposed the Law of Conservation of Mass
or Matter?
•
Explain what this law states.
• In the isotope Iron-53
• How many Protons?
• How many Electrons
• How many Neutrons?
• What is the Atomic Number of Neon (Ne)?
An element is defined by its number of ____?
a. Protons
b. Neutrons
c. Electrons
• The Mass Number of an atom is the number of
_________ plus the number of ________.
• The element Gold (Au).
• Number of Protons
• Number of Electrons
• Number of Neutrons
• Which scientist fired alpha particles at Gold foil
and concluded the atom consisted of a small,
dense, positive core he called a nucleus?
• Who is considered “The Father of Modern
Chemistry”?
• To determine the number of neutrons in an
atom you can subtract the number of ________
from the Atomic Mass number.
• The sub-atomic particle of the atom with a
“negligible” mass is ________. Its mass is so
small it is ignored when determining the mass of
the atom.
• The unit a.m.u. stands for _______.
• Cobalt (Co) has two isotopes: Cobalt-58 and
Cobalt-60. Which isotope contains the greatest
number of Protons?
• What is the electrical charge on an Electron?
• If you know the Atomic Number of a neutral
atom you know what other 3 things?
• What 2 sub-atomic particles are located in the
Nucleus of an atom?
• Which scientist who in 1803 proposed an Atomic
Theory which states all substances are
composed of atoms which cannot be created,
divided, or destroyed?
• Which scientist is credited with the discovery of
the Neutron?
• What is the only element which does not contain
a Neutron?
• Which neutral atom contains 93 electrons?
• If I subtract the Atomic number of Silver (Ag)
from the Atomic Mass of Iron (Fe), I would get a
number equal to the number of protons of what
element?
• What are the only two elements which occur as
liquids at room temperature?
• Which scientist is associated with the “Electron
Cloud” theory of electrons?
• Which scientist was 1st to prove an atom can be
divided into smaller parts?
• What is the element which contains 82 Protons?
• Which scientist proposed the term “Plum
Pudding Model” to describe the structure of the
atom?
• Which of the following cannot be changed
without changing to a new element.
• Number of Electrons
• Number of Neutrons
• Number of Protons
• What ancient Greek proposed an Atomic Theory
that stated that all matter is composed of small,
indivisible, indestructible particles?
• Which scientist proposed “The nucleus of an
atom is made up of particles called protons.”
• The Atomic number of Titanium (Ti), when
added to the Atomic Mass of Oxygen (O) equals
the number of electrons of what element?
• To calculate the weighted average atomic mass
for an element you must know the mass of the
different isotopes and their ______.
• Isotopes of the same element will always have
the same number of _________.