Quiz 5

The half life of a carbon 14 is 5730 years. If a 1 gram sample of old carbon is 1/8 as radioactive as 1 gram of a current sample, then the age of the old sample is about a. 716 years b. 11,500 years c. 17200 years d. 22900 years

17200

Which radium (A=88) emits an alpha particle, the resulting nucleus has atomic number a.86 b.88 c.90 d.92

86

which radiation has no association with electric charge? a.alpha b.beta c. gamma

Gamma

When thorium (A=90) emits a beta particle, the resulting nucleus has atomic number of a.88 b.90 c.92 d. none

None of the above

For an isotope with a half-life of one day, at the end of two days the amount that remains is a. none b. one-half c. one-quarter d. one-eighth

One-quarter

Which of the following isotopes is radioactive? a. carbon-12 b. carbon-14 c. both d. neither

carbon-14

when the nucleus of an atom emits a beta particle, the atom's atomic number a. increases b. decreases c. doesnt change

increases

Radiation dosages based on potential damage is in a.rads b.rems c. joules

rems

Which device is used primarily to detect nuclear raditation? a. synchrotron b. linear accelerator c. cyclotron d. scintillation counter

scintillation counter

x rays are emitted by way of a. ionizing radiation b. transitions within an atom's innermost electrons c. transitions within the atomic nucleus

transitions within an atom's innermost electrons