Part 13 - Radioactivity

Spontaneous emission of particles/ionizing radiation by unstable nuclei of heavier elements or unstable p+-to-n0 ratio.

a. Radioactivity

b. Electron affinity

c. Reactivity

d. Electronegativity

a. Radioactivity

Non-SI unit of radioactivity:

a. Curie (Ci)

b. Becquerel (Bq)

c. Roentgen (R)

d. Nanometer (Nm)

a. Curie (Ci)

SI unit of radioactivity:

a. Curie (Ci)

b. Becquerel (Bq)

c. Roentgen (R)

d. Nanometer (Nm)

b. Becquerel (Bq)

1 Curie (Ci) is equivalent to:

a. 2.7x10^5 decay/sec

b. 3.7x10^5 decay/sec

c. 2.7x10^10 decay/sec

d. 3.7x10^10 decay/sec

d. 3.7x10^10 decay/sec

1 Becquerel (Bq) is equivalent to:

a. 1 decay/sec

b. 1.5 decay/sec

c. 2 decay/sec

d. 2.5 decay/sec

a. 1 decay/sec

Marie Curie discovered which of the following?

a. Po, Ra

b. Co, Ni

c. Po, Ni

d. Co, Ra

a. Po, Ra

Unit of radiation damage.

a. Curie (Ci)

b. Becquerel (Bq)

c. Roentgen equiv(R)

d. Rad/gray

e. Roentgen equivalent man (REM)

e. Roentgen equivalent man (REM)

Unit of amount of exposure to radiation.

a. Curie (Ci)

b. Becquerel (Bq)

c. Roentgen equiv(R)

d. Rad/Gray (Gy)

e. Roentgen equivalent man (REM)

d. Rad/gray

1 Gy is equivalent to

a. 1 J/Kg

b. 2 J/Kg

c. 3 J/Kg

d. 4 J/Kg

a. 1 J/Kg

1 Gy is equivalent to how many rads?

a. 50 rads

b. 100 rads

c. 150 rads

d. 200 rads

b. 100 rads

True about radioactive emissions:

a. Radioisotopes decay randomly

b. Beta can penetrate body tissue

c. Gamma cannot penetrate body tissue

d. a and b

e. b and c

f. All

d. a and b

Radioactive emissions:

a) Radioisotopes decay randomly

b) Beta can penetrate body tissue

*c) Gamma CAN penetrate body tissue

Rays/Decay:

Heaviest (4)

a. Alpha

b. Beta

c. Gamma

a. Alpha

Rays/Decay:

Light (1/2000)

a. Alpha

b. Beta

c. Gamma

b. Beta

Rays/Decay:

No mass and charge is 0

a. Alpha

b. Beta

c. Gamma

c. Gamma

Rays/Decay:

Slowest (0.1 speed of light)

a. Alpha

b. Beta

c. Gamma

a. Alpha

Rays/Decay:

Fast (0.9 speed of light)

a. Alpha

b. Beta

c. Gamma

b. Beta

Rays/Decay:

Fastest (speed of light)

a. Alpha

b. Beta

c. Gamma

c. Gamma

Rays/Decay:

Low penetrating power

a. Alpha

b. Beta

c. Gamma

a. Alpha

Rays/Decay:

Medium penetrating power

a. Alpha

b. Beta

c. Gamma

b. Beta

Rays/Decay:

High penetrating power

a. Alpha

b. Beta

c. Gamma

c. Gamma

Alpha ray can be prevented by:

a. Paper

b. Aluminum

c. Lead

d. Iron

a. Paper

Beta ray can be prevented by:

a. Paper

b. Aluminum

c. Lead

d. Iron

b. Aluminum

Gamma ray can be prevented by:

a. Paper

b. Aluminum

c. Lead

d. Iron

c. Lead

Emission of alpha particle from the nucleus.

a. Alpha decay

b. Beta decay c. Gamma emisssion

d. Positron emission

e. Electron capture

a. Alpha decay

Emission of an electron from a nucleus.

a. Alpha decay

b. Beta decay c. Gamma emisssion

d. Positron emission

e. Electron capture

b. Beta decay

Observed when a nuclide is formed in an excited state and then decays to its ground state with the emission of a gamma ray.

a. Alpha decay

b. Beta decay

c. Gamma emisssion

d. Positron emission

e. Electron capture

c. Gamma emisssion

The presence of a nucleus in an excited state is often indicated by an asterisk (*).

a. True

b. False

a. True

β+ decay

a. Alpha decay

b. Beta decay c. Gamma emisssion

d. Positron emission

e. Electron capture

d. Positron emission

Emission of a positron from the nucleus.

a. Alpha decay

b. Beta decay c. Gamma emisssion

d. Positron emission

e. Electron capture

d. Positron emission

Positively charged subatomic particle having the same mass and magnitude of charge as the electron and constituting the antiparticle of a negative electron.

a. Negatron

b. Antineutron

c. Positron

d. P-bar

c. Positron

Occurs when one of the inner electrons in an atom is captured by the atom's nucleus.

a. Alpha decay

b. Beta decay

c. Gamma emisssion

d. Positron emission

e. Electron capture

e. Electron capture

Which undergoes alpha decay?

a. Polonium-210

b. Oxygen-15

c. Iodine-131

d. Potassium-40

e. Cobalt-60

a. Polonium-210

Which undergoes beta decay?

a. Polonium-210

b. Oxygen-15

c. Iodine-131

d. Potassium-40

e. Cobalt-60

c. Iodine-131

Which undergoes gamma emission?

a. Polonium-210

b. Oxygen-15

c. Iodine-131

d. Potassium-40

e. Cobalt-60

e. Cobalt-60

Which undergoes positron emission?

a. Polonium-210

b. Oxygen-15

c. Iodine-131

d. Potassium-40

e. Cobalt-60

b. Oxygen-15

Which undergoes electron capture?

a. Polonium-210

b. Oxygen-15

c. Iodine-131

d. Potassium-40

e. Cobalt-60

d. Potassium-40