Modern periodic table is arranged in ascending order of?
Correct answer: C. Proton number
- A. Nucleon number
- B. Atomic mass
- C. Proton number
- D. Mass number
Explanation
Elements of the periodic table are arranged in ascending order of their atomic number or proton number (which corresponds to the number of protons in the nucleus). Nucleon number, mass number, or atomic mass (all terms used to describe the same thing i.e. relative atomic mass) may have been used in earlier periodic tables.
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About Atomic Structure
Atomic structure covers the discovery of the proton, Planck's quantum theory, hydrogen emission spectra and the evidence for quantized energy levels. You will use quantum numbers to describe orbitals, distinguish s, p, d and f orbital shapes, and write electronic configurations, including the correct order of electron filling.
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