As we know the subatomic particles of atoms are proton, neutron, and electron So,1. Element: HydrogenAtomic number: 1The number of electrons: 1The number of protons: 1Number of Neutrons: 0 (Other isotopes of Hydrogen have one and two neutrons).2. Element: CarbonAtomic number: 6The number of electrons: 6The number of protons: 6Number of Neutrons: 6 (Other isotopes of Oxygen have 6 and 7 neutrons).3. Element: OxygenAtomic number: 8The number of electrons: 8The number of protons: 8Number of Neutrons: 6 (Other isotopes of Oxygen have 9 and 10 neutrons).