Yes they are. Also note that hydrogen 2 is more usually called deuterium. And hydrogen 3 is called tritium.
Hydrogen-1 and hydrogen-2 isotopes are radioactively stable.
Each isotope of hydrogen has 1 proton in the nucleus. The difference between the isotopes lies in the number of neutrons: hydrogen-1 has 0 neutrons, hydrogen-2 (deuterium) has 1 neutron, and hydrogen-3 (tritium) has 2 neutrons.
Both hydrogen-1 and hydrogen-2 are isotopes of hydrogen, with hydrogen-1 being the most common isotope and hydrogen-2 being a rare isotope known as deuterium. Both isotopes consist of one proton in their nucleus, but deuterium also has one neutron alongside the proton, making it heavier than hydrogen-1.
There are three known naturally occurring isotopes of hydrogen; hydrogen-1 with one proton and no neutrons, hydrogen-2 with one proton and one neutron, and hydrogen-3 with one proton and two neutrons.
neutrons
Hydrogen-1 and hydrogen-2 isotopes are radioactively stable.
Isotopes of hydrogen are Hydrogen-1 (protium), ‎Hydrogen-2 (deuterium), ‎and Hydrogen-3 (tritium).
Isotopes have different number of neutrons, in the given isotopes, there are 0 and 1 neutrons respectively.
Hydrogen has 1 unstable isotope, and 2 stable isotopes.
Isotopes (of hydrogen) differ in the number of neutrons in the nucleus of the atoms.
Hydrogen-1 and hydrogen-2 isotopes are radioactively stable.
Hydrogen-1 isotopes have one proton and no neutrons. Hydrogen-2 isotopes have one proton and one neutron.
Each isotope of hydrogen has 1 proton in the nucleus. The difference between the isotopes lies in the number of neutrons: hydrogen-1 has 0 neutrons, hydrogen-2 (deuterium) has 1 neutron, and hydrogen-3 (tritium) has 2 neutrons.
Three isotopes: Protium, deuterium and tritium with 0, 1 and 2 neutrons. all isotopes have 1 proton and 1 electron.
Both hydrogen-1 and hydrogen-2 are isotopes of hydrogen, with hydrogen-1 being the most common isotope and hydrogen-2 being a rare isotope known as deuterium. Both isotopes consist of one proton in their nucleus, but deuterium also has one neutron alongside the proton, making it heavier than hydrogen-1.
You seem to be referring to isotopes of hydrogen.
No the atomic number is same for the three isotopes of hydrogen (it is 1). The three isotopes of hydrogen differ by the number of neutrons.