Rhenium – Re75
Atomic Number 75 | Atomic Symbol Re | Atomic Name Rhenium
1.9
Technetium – Tc43
Atomic Number 43 | Atomic Symbol Tc | Atomic Name Technetium
Copper – Cu29
Atomic Number 29 | Atomic Symbol Cu | Atomic Name Copper
Silicon – Si14
Atomic Number 14 | Atomic Symbol Si | Atomic Name Silicon