Answer: 238AcAn alpha particle consists of two protons and two neutrons, and is given the symbol 4He. According to the law of conservation of mass, the reaction must proceed as follows:238Ac --> 4He + 234Fr.

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CLEP Chemistry

Category - Multiple Choice

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A species undergoes alpha emission to form ²³⁴Fr. What is this species?

²³⁶Ra
²³⁶Rn
²³⁴Rn
²³⁸Ac
²³⁶Ac

Explanation

Answer: ²³⁸Ac

An alpha particle consists of two protons and two neutrons, and is given the symbol ⁴He. According to the law of conservation of mass, the reaction must proceed as follows:

²³⁸Ac --> ⁴He + ²³⁴Fr.

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