For the most part Helium has two neutrons, the exception is with isotopes.
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neutrons of all atoms are alike
Helium has the least number of neutrons among the elements listed.
The average number of neutrons that a specific element has is equivilent to the element's atomic mass minus the that elements atomic number. For example Helium has 2 neutrons because its atomic mass (4) minus the atomic number (2) is 2.
Electrons, Neutrons, and Protrons
Each chemical element has a different number of protons; the number of neutrons can be similar.
All chemical elements (excepting the isotope 1H) contain neutrons.
Lighter elements tend to have neutrons equal to protonms or only a slight excess. Heavier elements have an excess of neutrons over protons
Helium-4 has 2 protons and 2 neutrons, and is formed both by the fusion of hydrogen in stars and in the decay of heavy radioactive elements. The neutral atom has 2 electrons.
Oxygen=8 Bromine=45 Helium=2 Argon=22 Manganese=30 Silicone=14
Uranium is a chemical element and doesn't contain other elements,As all chemical elements uranium is formed from protons, neutrons and electrons.
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Atoms of all elements can have neutrons in them. Only the element hydrogen has an isotope whose atoms do not contain neutrons, but all other isotopes of hydrogen have neutrons in them. In the heavier elements the number of neutrons always exceeds the number of protons in the atom.
neutrons of all atoms are alike
Helium has the least number of neutrons among the elements listed.
The average number of neutrons that a specific element has is equivilent to the element's atomic mass minus the that elements atomic number. For example Helium has 2 neutrons because its atomic mass (4) minus the atomic number (2) is 2.
1. Compounds molecules are formed from chemical elements. 2. Each element is formed from specific atoms. 3. Each atom contain protons, neutrons and electrons. 4. Protons and neutrons contain quarks and gluons.