11. Given the reaction: Al+ He-X+n When the equation is correctly balances, the nucleus represented by X is 30 Si B. 14 C. P D. 30S 16 A. AI

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Chapter1: Chemical Foundations
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14. An original sample of a radioisotope had armass
of 10 grams. After 2 days, 5 grams of the
radioisotope remains unchanged. What is the
half-life of this radioisotope?
11.
Given the reaction:
Al + He-X+n
A. 1 day
B. 2 days
C. 5 days
D. 4 days
When the equation is correctly balances, the
nucleus represented by X is
A AI
B. S
D.
Nuclear Chem
Page 2
31
2 /2
Page
Transcribed Image Text:14. An original sample of a radioisotope had armass of 10 grams. After 2 days, 5 grams of the radioisotope remains unchanged. What is the half-life of this radioisotope? 11. Given the reaction: Al + He-X+n A. 1 day B. 2 days C. 5 days D. 4 days When the equation is correctly balances, the nucleus represented by X is A AI B. S D. Nuclear Chem Page 2 31 2 /2 Page
3.
In the reaction Li +jaHe+X, the species
represented by X is
A. H
B. H
C. He
D. He
In the reaction X +H Li+He, the nucleus
represented by X is
9.
A. Li
B "B
C Be
D C
229
Rn
He + X, the term X
In the equation
rpresents
10.
218
84
26 Ra
D.
A.
226
C.
Ra
Transcribed Image Text:3. In the reaction Li +jaHe+X, the species represented by X is A. H B. H C. He D. He In the reaction X +H Li+He, the nucleus represented by X is 9. A. Li B "B C Be D C 229 Rn He + X, the term X In the equation rpresents 10. 218 84 26 Ra D. A. 226 C. Ra
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