The atomic number of an element is equal to the number of:
Correct answer: B. Protons in the nucleus
- A. Neutrons in the nucleus
- B. Protons in the nucleus
- C. Protons and neutrons combined
- D. Electron shells
Explanation
The atomic number equals the number of protons in the nucleus and determines the identity of the element. The mass number is the sum of protons and neutrons; isotopes of an element share an atomic number but differ in mass number.
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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.
Practise Atomic Structure
922 free Atomic Structure MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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