Number of proton are represented by
Correct answer: A. Atomic number
- A. Atomic number
- B. Mass number
- C. Hydrogen
- D. None
Explanation
The atomic number, denoted by the letter 'Z', represents the number of protons in the nucleus of an atom. It determines the identity of the atom and is used to classify elements in the periodic table. Each element has a unique atomic number. The mass number, also known as the atomic mass number or nucleon number, is the total number of protons and neutrons in the nucleus of an atom. It is denoted by the letter 'A'. Since protons and neutrons have similar masses, the mass number is often a whole number. Hydrogen is the lightest and simplest element in the periodic table, with an atomic number of 1. It consists of a single proton in its nucleus and one electron orbiting around it. This is incorrect since option A is correct.
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About Discovery of the Proton
The discovery of the proton follows the study of positive rays, also called canal rays, observed in discharge tubes and later identified as positively charged particles. The work of Goldstein and Rutherford is linked to the proton's charge, relative mass and role in the nuclear model, distinct from the discovery of the electron.
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