Atoms from reading

3. Nuclear _______, the byproduct of making nuclear energy.
5. Particle smaller than a proton or neutron.
8. Type of acids that are the building blocks of protein.
10. The amount of matter in something.
13. Gas in the upper atmosphere which shields us from the sun's ultraviolet rays.
14. The splitting of atoms causes other atoms to split in this process.
16. What happens when the nuclei of two atoms combine.
17. Chemical name for salt.
19. Site of 1979 nuclear accident in the U.S.
20. What could happen when the uranium pellets in the rods at the core of a nuclear reactor become overheated.
22. Element that forms graphite.
24. Heavy element used in making nuclear bombs and nuclear energy.
26. Kind of force that holds the nucleus of an atom together.

1. Photo taken with laser light.
2. Giving off high-energy rays
4. Positively charged particle in the nucleus of an atom.
6. The splitting of an atom.
7. Element with an atomic number of 18 and the symbol "Ar".
9. One of the most radioactive spots on Earth due to 1986 nuclear accident.
11. Scientist who theorized that mass and energy are variations of each other.
12. Form of light with a strong concentrated beam.
15. Weapon dropped on Japan by the US in 1945.
18. A different form of an element based on the number of neutrons.
21. Type of visible energy.
23. Unit of measurement for an atom's mass.
25. Particles in an atom's nucleus that have no charge.