DOL: 4/23-4/24_Radiation

Uranium emits a type of radiation that does not penetrate human skin, but can be harmful if it gets inside body cells. Which of the following describes the type of radiation emitted by uranium?

• alpha radiation

• beta radiation

• neutron radiation

• gamma radiation

When an atomic nucleus emits an alpha particle, what happens to the atomic number of the atom?

• increases by one

• decreases by one

• increases by two

• decreases by two

There are several types of nuclear decay. In alpha decay, a nucleus splits into a helium nucleus and a nucleus of an element whose atomic number is two less than that of the original atom. What interaction between forces causes alpha decay to occur?

• strong force exceeds the weak force

• strong force exceeds the electromagnetic force

• gravity exceeds the electromagnetic force

• electromagnetic force exceeds the strong force

Which of the following characterizes gamma radiation?

• It is weakly ionizing and penetrates dense materials.

• It moves fast and the particles are positively charged.

• It moves slowly and the particles are negatively charged.

• It is strongly ionizing and cannot penetrate dense materials.

An alpha particle that is emitted as nuclear radiation has the same structure as a____.

• helium nucleus.

• hydrogen nucleus.

• neutron.

• electron.

Which types of electromagnetic waves are ionizing radiation?

• microwaves and infrared light

• microwaves and X-rays

• gamma rays and infrared light

• gamma rays and X-rays