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β (Beta particle)
- Medium Penetration
- Mass: 1/2000 amu
Looks like unfinished infinity sign
- Charge: +2
- Mass:4 amu
- Least penetration
- Deepest penetration0/0λ
atomic number (z)
- number of protons. This identifies an element.
- same as number of electrons.
If you know the number of electrons then you also know..
the number of protons
Atomic mass number
number at the bottom.. is the number of protons and neutrons added together.
Atoms with identical atomic numbers but different mass numbers
average mass of atoms in sample
- on left side of equation.