Figure 1 Structure of an Atom 1. What part of the atom is identified as c?
2. What does d in the diagram represent?
3. How many protons does the atom have?
4. How many neutrons does the atom have?
5. What is the atomic mass of the atom?
6. What is the atomic number of the atom?

Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?