Match these items.

1. protons plus neutrons

atomic mass

2. proton number

Geiger counter

3. detects radiation

atom

4. fixed shape

gas

5. neutral charge

electron

6. positive charge

solid

7. occupies the whole container

atomic number

8. measures intensity of radiation

neutron

9. smallest particle to retain characteristics

photographic film

10. negative charge

proton

1. protons plus neutrons = atomic mass

2. proton number = atomic number

3. detects radiation = Geiger counter

4. fixed shape = solid

5. neutral charge = neutron

6. positive charge = proton

7. occupies the whole container = gas

8. measures intensity of radiation = photographic film

9. smallest particle to retain characteristics = atom

10. negative charge = electron