# Find the Number of Neutrons Rb

Find the Number of Neutrons Rb
Find the element on the periodic table.
 37 Atomic Number Rb Element Symbol Rubidium Element Name 85.48 Average Atomic Mass
The atomic weight is basically a measurement of the total number of particles in an atom's nucleus including both protons and neutrons. So the first step is to locate the atomic mass on the periodic table, and round the value to the nearest whole number.
round to
The mass number is the number of particles in an atom's nucleus. The nucleus is made up of protons and neutrons.
Find the element on the periodic table.
 37 Atomic Number Rb Element Symbol Rubidium Element Name 85.48 Average Atomic Mass
To find the number of protons in , first locate the element on the periodic table. Next, find the atomic number which is located above the element's symbol. Since 's atomic number is , has protons.
protons
Fill in the known values where represents the number of neutrons.
Rewrite the equation as .
Move all terms not containing to the right side of the equation.
Subtract from both sides of the equation.
Subtract from .
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