U2, L3:Radioactivity and Nuclear Energy

Multiple Choice

Where is the mass of the atom concentrated ?

• Electrons

• Neutrons

• Shells

• Nucleus

Fill in the Blank

Which particle is the lightest ? Protons? Neutrons? Electrons?

Fill in the Blank

Why is the nuclear binding energy needed?

Multiple Choice

Radioactive elements contain high number of :

• Electrons

• Neutrons

• Atoms

• Protons

Multiple Choice

All of the following are radioactive elements except:

• Radium

• Uranium

• Sodium

• Cesium

Fill in the Blank

Write the 3 radiations released by radioactive elements.

,

Multiple Select

Choose all that is correct about radioactivity:

• Fusion of protons together.

• Decay of radioactive elements

• Release of gamma radiation

• Release of infrared rays.

Multiple Choice

All of the following are uses for radiaitions except:

• Treat cancer.

• To eliminate pests

• To generate electricity

• To manufacture silicon chips

• To treat hair loss.

Fill in the Blank

What is the name of the city that experienced a nuclear disaster and had many effects?

Multiple Choice

Isotopes have the same number of ??

• Electrons

• Protons

• Neutrons

• Atoms

Fill in the Blank

The unit to measure radiation absorbed by the body is _________