Alpha (α) particles are helium (He) nucleus with a charge of __________ ?
Correct answer: B. 2e
- A. e
- B. 2e
- C. 3e
- D. 4e
Explanation
An alpha particle is a helium nucleus with two protons, and each proton contributes a charge of +e, giving a total charge of +2e. The likely wrong choice is 4e, which incorrectly treats the two neutrons as charged particles.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
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.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Discovery of the Proton questions
Elements which emit natural radioactivity are known as __________ ?
A helium nucleus comprising of two protons and two neutrons with a charge of 2e is _________ ?
In SI base units, 1 Bq is equal to __________ ?
Alpha particles can be detected by using___________?
Neutrons moving with an energy of 1.2 MeV are called_______________?
Centrifugal forces are balanced in atom by__________________?