I am an engineering researcher at the
University of California-Santa Barbara. Thank you
for your question “Do all atoms have the same
number of protons?”
All atoms, in fact, do not have the same number of
protons. All atoms of the same element—whether it
is a hydrogen, helium, carbon, or oxygen atom—will
have the same number of protons, but atoms of
different elements will have different number of
protons. For example, all hydrogen atoms have 1
proton, all helium atoms have 2 protons, all
carbon atoms have 6 protons, and all oxygen atoms
have 8 protons. The number of protons that an
element has is called the “atomic number”.
Elements are arranged in order on a chart called
the periodic table according to their atomic
number. I have attached a link to a periodic
table, which contains all the elements. You can
see the name of the element in each square, and in
the top right of each square is that element’s
I hope this helps with your question!
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