Physics · Radioactivity
What is the rest mass of a beta (β) particle?
- 10 kg
- 21.67 × 10⁻²⁷ kg
- 36.6 × 10⁻²⁷ kg
- 49.1 × 10⁻³¹ kg✓
Correct answer
9.1 × 10⁻³¹ kg
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