Match these items.

1. ca 1.neutron

2. h2o 2. element

3. nuclear decay 3.electron

4. nuclear synthesis 4.compound

5. η 5.atomic number

6. positive energy 6.proton

7. e 7.fusion

8. number of protons in nucleus 8.fission

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?