A neutron, although this is not always the case as there are hydrogen atoms with neutrons, but hydrogen atoms are the only one which are able to not have a neutron.
All elements up to Iron are found in very star (except for very young stars as they have not reached that point yet). Though most of the elements are hydrogen and helium.
Hydrogen and helium
hydrogen and carbon
The elements found in KOH are potassium, oxygen and hydrogen.
These elements are: carbon, oxygen, hydrogen.
In the nucleus of an atom protons and neutrons can be found. All atoms of all elements have protons and neutrons except one isotope of hydrogen.
Seven elements are found in group A or group 1.These are Hydrogen,Lithium,Sodium,Potassium,Rubidium,Caesium and Francium. Except Hydrogen all are metals.
All elements up to Iron are found in very star (except for very young stars as they have not reached that point yet). Though most of the elements are hydrogen and helium.
Some volcanoes and oil wells may release small amounts of hydrogen gas, but it is seldom found in nature except in compounds with other elements, such as water.
#silver#
Hydrogen and helium
the elements found in nitrogen, hydrogen and oxygen
Neutrons are available in all element nuclei except hydrogen nucleus. It can be obtained through specific nuclear reactions and through nuclear fission.
There are 2 elements found in ammonium, nitrogen and hydrogen.
Water contains hydrogen and oxygen. Sugar contains carbon, hydrogen and oxygen.
hydrogen and nitrogen
hydrogen and carbon