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Level 23

Reading the Periodic Table


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Element Chemical Symbol
A one or two letter representation of an element
Element Name
The scientific name of an element
number of electrons
atomic number (if NEUTRAL) atom only
Number of Protons
Equal to the atomic number
Chemical Symbol
A one or two letter representation of an element
Number of Neutrons
Found by subtracting the Atomic Number from the Mass Number
mass number
Sum of protons and neutrons
Atomic mass
A relative mass determined by means of a standard
Isotope
An atom of a particular element that contains a different number of neutrons
Radioactive Decay
Release of nuclear particles and energy from unstable atomic nuclei
Transmutation
A change in the identity of a nucleus as a result of a change in the number of its protons
Half-Life
Time it takes for half the atoms of an isotope to decay