Are of protons in and Atom
Hydrogen.
The only element that has one proton and no neutrons is a hydrogen atom.
Hydrogen.
Neutrons
Look up the name on the periodic table and subtract the atomic number from the mass number (which is protons and neutrons). That will give you the number of neutrons.
Atoms of the same element with varying numbers of neutrons are isotopes.
The only element without any neutrons is Hydrogen-1, which has a lone proton.
Hydrogen.
The only element that has one proton and no neutrons is a hydrogen atom.
The element neon is a pure element made of only neutrons, electrons, and protons.
Hydrogen is the only element without any neutrons.
Hydrogen.
Neutrons
There is no ELEMENT which contains no neutrons HOWEVER there is an isotope of hydrogen called protium which is a single proton surrounded by a single electron.
21 protons and 24 neutrons in the only stable for. But there can be as few as 15 and as many as 39 neutrons.
neutrons
Isotopes are atoms of the same element that are only different by the number of neutrons they have