SPACE MATH @ NASA | Nuclear Arithmetic

Over $100$ elements have been discovered over the last century. The nucleus of each atom contains two kinds of particles: protons and neutrons. 

Scientists classify each element by the number of protons ($Z$) and the mass of the element ($A$). 

• $Z$ is called the Atomic Number 
• $A$ is called the Atomic Mass 

The number of neutrons ($N$) in the nucleus is given by the formula: 

$N = A - Z$

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