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Unit - 4.1 Structure of an Atom — CHEMISTRY STD 8 — Question

ICSE BoardEnglish MediumSTD 8CHEMISTRYUnit - 4.1 Structure of an Atom2 Marks
Question
What do you understand by the following terms:
(a) atomic number,
(b) mass number?
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Answer

(a) atomic number - The atomic number of an element is determined by the number of protons in it, and it is used to differentiate one element from another. The mass number of an element is determined by the number of protons and neutrons combined.
(b) mass number - mass number, in nuclear physics, the sum of the numbers of protons and neutrons present in the nucleus of an atom.

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