1. Oxygen Atomic number: 8
O number of protons: 8
2. K number of electrons: 19
K Number of Neutrons: 20
3.Cu mass number: 63.546 u or 63.55 u
4. Pt atomic number: 79
Pt Number of Neutrons: 117
5. Si mass number: 28.0855 u
Si number of electrons: 14
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Answers & Comments
1. Oxygen Atomic number: 8
O number of protons: 8
2. K number of electrons: 19
K Number of Neutrons: 20
3.Cu mass number: 63.546 u or 63.55 u
4. Pt atomic number: 79
Pt Number of Neutrons: 117
5. Si mass number: 28.0855 u
Si number of electrons: 14
HOPE IT HELPS