Interpretation:
Subatomic particle that identifies an atom as that of a particular element needs to be determined.
Concept introduction:
Atom is the smallest particle in the element that can neither be created nor be destroyed. It is composed of three subatomic particles, protons, neutrons and electrons.
Answer to Problem 21SSC
The subatomic particle proton identifies an atom of a particular element.
Explanation of Solution
An atom is defined on the basis of an
For example: An atom has 7 protons, so its atomic number is 7, now according to modern periodic table the element with atomic number 7 is Nitrogen. Thus, the atom is of element-Nitrogen.
Hence, number of protons can identify an atom of a particular element.
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