hydrogen
Hydrogen has atomic number 1 whereas helium's is 2.
No, Hydrogen is lighter than Helium. However, Helium is the 2nd lightest element with an atomic number of 2.
The atomic number of Helium is 2.
atomic number
The outer shell of helium does not have an atomic number, that number belongs to helium itself whose atomic number is 2.
Hydrogen.
Ammonium is a polyatomic ion, not an element and thus it does not have an atomic number. It is composed of nitrogen and hydrogen and has the formula NH4+. Nitrogen has the atomic number 7. Hydrogen has the atomic number 1.
The first 10 elements, in order of atomic number, are: Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
The atomic number of all elements including Hydrogen is detemined by the number of protons it has for example, Helium's atomic number is 2 because it only has 2 protons.
Hydrogen has atomic number 1 whereas helium's is 2.
Helium 2, its first ring of electrons is fully saturated
The atomic number of helium is one more than that of hydrogen. In both the elements, the electrons are filled in the 1s orbitals. Hydrogen has one electron, helium has two.
The periodic table is a good reference - check out the atomic number ! Helium - 2 protons, Nitrogen - 7 protons
There are 12 such elements and they are hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, neon, sodium and magnesium.
The only atom that contains one proton is the hydrogen atom, also called protium. It is neutrally charged with a single proton at its nucleus, and a single electron orbiting. It is possible that you are asking about the isotope of hydrogen called tritium. Tritium is a radioactive isotope of hydrogen that contains a single proton and two neutrons.
No, Hydrogen is lighter than Helium. However, Helium is the 2nd lightest element with an atomic number of 2.
Ammonia is a molecule, NH3, so there is no atomic number. However, the atomic number of nitrogen (N) is 7 and the atomic number of hydrogen (H) is 1.