Download Element Name, Atomic Mass, The Periodic Table of Elements lists

Chemistry 3.2: Element Name, Atomic Mass,
The Periodic Table of Elements lists all of the known
elements. The number of protons in an atom is called the
element's a________ n________.
The Periodic Table of Elements lists all of the known
elements. Each element has a different atomic s________.
Some Periodic Tables of Elements list the element’s name.
Each element has a symbol and a n________.
This picture shows the element with the symbol “C” has the
e________ n________ of carbon.
In this picture, the atomic n________ is 11, the atomic
s________ is Na, and the element n________ is sodium.
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In this picture, the atomic number is 19, the atomic symbol is
K, and the e________ n________ is potassium.
Mass is the term used in chemistry that means the same thing
as weight. The average mass of protons, neutrons and
electrons of an atom is the a________ mass or atomic
w________.
The average total mass (or weight) of the protons, neutrons,
and electrons in an atom is the atom’s a________ mass.
In this picture, the atomic number is 6, the atomic symbol is C,
the element name is carbon, and the a________ m________
(weight) is 12.01115.
The mass n________ of 4.0026 represents the sum of the
number of protons (2) and neutrons (2) in the nucleus for an
atom of helium.
2
amu
Atomic mass is measured using something called Daltons.
Scientists also call a Dalton an Atomic M________ Unit
(amu).
amu
The mass of an atom is the sum of all the atomic mass
u________ in that atom.
amu
An a________ mass unit is a proton or neutron, and to a very
small degree an electron.
A proton is an a________ m________ u________ (amu).
A neutron is an atomic mass unit (a________).
Carbon has 6 protons and 6 neutrons which equals 12
a________ m________ u________.
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Potassium has 19 protons and 20 neutrons which equals 39
atomic mass u________.
Scientists assigned the carbon-12 atom a mass of exactly 12
atomic mass units (a________).
The mass of all atoms is based on the mass of carbon.
Carbon's mass is twelve a________ (atomic mass units).
One a________ m________ u________ (amu) is defined as
1/12 of a carbon-12 atom.
Atomic mass is the average of all the known isotopes of an
element. An i________ is an atom that has gained or lost one
or more neutrons.
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An atom that has gained or lost neutrons is called an
i________.
Carbon 13 is an i________ of an atom of carbon that has
gained 1 extra neutron.
Carbon 14 is an isotope of an atom of carbon that has
g________ 2 extra neutrons.
The average atomic mass of carbon 12, carbon 13, and carbon
14 is 12.01115, so the a________ mass of an atom of carbon is
12.01115.
The sum of all the a________ m________ u________ of an
atom is its atomic mass.
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Review
The number of protons in an atom is called the element's
a________ n________.
Each element has a s________ and a name.
The element with the symbol “C” has the element n________
of carbon.
When the atomic n________ is 11, the atomic s________ is
Na, then the element n________ is sodium.
M________ is the term used in chemistry that means the same
thing as weight.
The average total mass (or weight) of the protons, neutrons,
and electrons in an atom is the atom’s a________ m________.
Atomic mass is measured using something called an
a________ m________ u________ (amu).
One atomic mass unit (a________) is defined as 1/12 of a
carbon-12 atom.
Atomic mass is the average of all the known i________ of an
element.
An isotope is an atom that has g________ or l________ one or
more neutrons.
The sum of all the atomic mass units of an atom is its
a________ m________.
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