All atoms of the same element have the same atomic number because the number of protons determines the element’s identity and chemical properties. Any change in the number of protons would result in a different element.
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The atomic number varies across different elements, with each element having a unique atomic number that corresponds to the number of protons in its nucleus.
The atomic number of hydrogen is 1 because each hydrogen atom contains one proton in its nucleus.
The atomic number of an element corresponds to the total number of protons present in the nucleus of its atoms. It is represented by ‘Z’ in the periodic table.
The atomic number (denoted by ‘Z’) uniquely identifies each element and determines its chemical properties. Elements are defined by the number of protons they possess, which is reflected in their atomic number.