Forces in Creation Module 13

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Across

3. protons + neutrons = (2 Words)

6. number of protons in an atom (2 Words)

8. atomic number 12.0

9. atom with a nucleus that is not stable (2 Words)

10. organized way that chemist have grouped atoms together (2 Words)

13. 13 protons and 14 neutrons

14. collection of atons that have the same number of protons

15. protons and neutrons are made of these smaller particles

Down

1. an atoms attempt to stablize (2 Words)

2. short range attractive force tha attracts protons and neutrons together (2 Words)

4. time it takes for half of an isotope to decay

5. dating objects by measuring radioactive decay (2 Words)

7. same number of protons but different number of neutrons

11. neutrons changes into a proton (2 Words)

12. center of an atom

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