3H is probably the most common. Technically 31H (the 3 and the 1 should actually be "stacked", but HTML doesn't really allow that) is correct as well, though the 1 is redundant (the H already tells you it has 1 proton).
Since T is not used as a symbol for any other element, you'll occasionally see that as well. However, it's not "official".
The atom with 55 protons and 78 neutrons is silver-133. Therefore, the correct nuclide symbol would be (_{47}^{133}Ag).
Tritium is 3H, so it has one proton, one electron (in the non-ionized state) and two neutrons.
All hydrogen atoms, regardless of the number of neutrons in its isotope (zero neutrons for protium, one for deuterium, two for tritium), would have only one proton.
The correct electron dot symbol for an aluminum atom in the ground state is: [ \text{Al} : \begin{array}{c} .\bullet \ .\bullet \ . \bullet \ \text{Al} \end{array} ]
The symbol for a chlorine atom is Cl.
Tritium [note correct spelling] has one proton and two neutrons per atom.
Tritium decay to helium-3.
The atom with 55 protons and 78 neutrons is silver-133. Therefore, the correct nuclide symbol would be (_{47}^{133}Ag).
3H is probably the most common. Technically 31H (the 3 and the 1 should actually be "stacked", but HTML doesn't really allow that) is correct as well, though the 1 is redundant (the H already tells you it has 1 proton). Since T is not used as a symbol for any other element, you'll occasionally see that as well. However, it's not "official".
2
One
Tritium is 3H, so it has one proton, one electron (in the non-ionized state) and two neutrons.
One - assuming the atom is not an ion.
1.6749x10-24
All hydrogen atoms, regardless of the number of neutrons in its isotope (zero neutrons for protium, one for deuterium, two for tritium), would have only one proton.
The correct electron dot symbol for an aluminum atom in the ground state is: [ \text{Al} : \begin{array}{c} .\bullet \ .\bullet \ . \bullet \ \text{Al} \end{array} ]
Iron's symbol is Fe.