Bis allylic protons are nuclei of hydrogen atoms (bonded to the same carbon atom) that are in allylic positions with respect to two different C=C double-bonds. For example, the bolded hydrogen atoms in the structure below represent bis allylic protons, since they are in an allylic position with respect to the C=C bonds on both the left and the right.
R-CH=CH-CH2-CH=CH-R
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Helium: He, 2 protons. Oxygen: O, 8 protons. Iron: Fe, 26 protons. Gold: Au, 79 protons.
The number of protons in Beryllium is 4.
The number of protons in an atom's nucleus determines its chemical identity.
Beryllium has 4 protons.
No, carbon can not have 8 protons. The number of protons in an element can not vary. Carbon can only have 6 protons (the atomic number). If an element has 8 protons, it is oxygen.