MCQ
In $_{88}R{a^{226}}$ nucleus, there are
- A$138$ protons and $88$ neutrons
- ✓$138$ neutrons and $88$ protons
- C$226$ protons and $88$ electrons
- D$226$ neutrons and $138$ electrons
✓
Answer
Correct option: B.
$138$ neutrons and $88$ protons
b
(b) $_z{X^A}{ = _{88}}R{a^{226}}$
(b) $_z{X^A}{ = _{88}}R{a^{226}}$
Number of protons $= Z = 88$
Number of neutrons $ = A - Z = 226 - 88 = 138$.
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