Atomic mass of an atom is present in the __________?
Correct answer: C. Nucleus
- A. Shell
- B. Orbit
- C. Nucleus
- D. Orbital
Explanation
Nearly all an atom's mass is concentrated in its nucleus because it contains the relatively heavy protons and neutrons, whereas electrons have extremely small mass. The likely distractor is the shell, but shells describe regions occupied by electrons rather than the location of most atomic mass.
Last updated
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.
Practise Atomic Structure
922 free Atomic Structure MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
A helium nucleus comprising of two protons and two neutrons with a charge of 2e is _________ ?
According to Millikan's oil drop experiment, the charge on an oil droplet is:
Alpha (α) particles are helium (He) nucleus with a charge of __________ ?
Alpha particles can be detected by using___________?
Angle of deflection was studied by________________?