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Name _____________________________ Period ______ Date __________________
Atom Introduction
Charge on a proton
Charge on an electron
Charge on a neutron
Element is identified by the
number of these particles in
the nucleus
Mass of a proton
Mass of a neutron
Mass of an electron
Unit usually used to
express the mass of 1
mole of an element
Unit usually used to
express the mass of 1
atom of an element
Protons are located here
Electrons are located
here
Neutrons are located here
The number of protons in
an atom
The sum of the protons
and the neutrons in an
atom
A certain atom has 6 protons, 6 neutrons, and 6 electrons.
What element is this? _____________________
What is this element’s atomic number? _________
What is this element’s mass number? __________
Put the element’s symbol on the short line below.
Put the mass number here
Put the atomic number here
_______
(symbol)
___________________________
(Full name of element)
____________
mass number
A certain atom has 6 protons, 8 neutrons, and 6 electrons.
What element is this? _____________________
What is this element’s atomic number? _________
What is this element’s mass number? __________
Put the element’s symbol on the short line below.
Put the mass number here
Put the atomic number here
_______
(symbol)
This is the
NUCLEAR SYMBOL
of the isotope
This is the
ISOTOPE NAME
This is the
NUCLEAR SYMBOL
of the isotope
This is the
___________________________
____________
ISOTOPE NAME
(Full name of element)
mass number
The atoms described above have the ________ (same/different) number of protons and a
___________ (same/different) number of neutrons. They are ____________ of each
other. They have the same ___________ (atomic/mass) number and a different
_____________ (atomic/mass) number.
An atom has no charge. An ion does have a charge.
Consider a particle that has 12 protons, 13 neutrons, and 10 electrons.
What element is this? ____________________
What is the atomic number? _________ What is the mass number? ________
Write both the nuclear symbol and the isotope name below:
_____________
______________________
Nuclear Symbol
Isotope Name
How many positive charges are in this particle? ____________
How many negative charges are in this particle? ____________
What is the net charge on this particle?
____________
Is this at atom or an ion? _________________
Consider a particle that has 8 protons, 8 neutrons, and 10 electrons.
What element is this? ____________________
What is the atomic number? _________ What is the mass number? ________
Write both the nuclear symbol and the isotope name below:
_____________
______________________
Nuclear Symbol
Isotope Name
How many positive charges are in this particle? ____________
How many negative charges are in this particle? ____________
What is the net charge on this particle?
____________
Is this at atom or an ion? _________________