The element hydrogen is first on the periodic table, so its atomic number is 1.We can infer from this information that every hydrogen atom must have:one protonone electronone neutron
Question
The element hydrogen is first on the periodic table, so its atomic number is 1.We can infer from this information that every hydrogen atom must have:one protonone electronone neutron
Solution
Every hydrogen atom indeed has one proton and one electron, as the atomic number represents the number of protons in an atom and hydrogen's atomic number is 1. The number of electrons in a neutral atom equals the number of protons, so hydrogen also has one electron. However, it's not accurate to say that every hydrogen atom has one neutron. The most common isotope of hydrogen, protium, has no neutrons. Other isotopes of hydrogen, such as deuterium and tritium, have one and two neutrons respectively.
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