Question

In: Physics

1. A typical α-decay from a parent nucleus AZX may be indicated as : Group of...

1. A typical α-decay from a parent nucleus AZX may be indicated as :

Group of answer choices

AZX → (A−4)(Z − 2) Y + 42He

AZX → (A+4)(Z+2) Y + 22He

AZX → (A−4)Z Y + 42He

AZX → (A−4)(Z+2) Y + 42He

2. An element of atomic number 83 in a relatively higher energy state decays radioactively to an element of atomic number 84 with lower energy level. This must include

Group of answer choices

an α emission

a β emission

a γ emission

a β & γ emission

3. The half- life of radium-226 is 1.6 × 103 . If a sample initially contains 3.0 × 1016 such nuclei, what is the number of radioactive radium-226 nuclei remaining after 4.8 × 103 years?

Group of answer choices

2.25 × 1012

3.75 × 1016

2.2 × 1016

3.75 × 1015

Solutions

Expert Solution

genius_generous answered 2 years ago
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