Answer:
a. in supernovae and star collisions
Explanation:
The periodical table contains some heavier elements, which are formed as neutron stars pairs hit eachother and erupt cataclysmically.
The star emitts very large quantities of energy and neutrons during supernova, which allow for the production of heavier elements than iron, such as uranium and gold. All these elements are ejected into space during the supernova explosion.
Answer:
Because the Earth is always shifting, so research has to constantly be updated.
1. C
2. C
3. B
4. D
5. C
6. D
7. B or C
8. B
9. A or D
10. B
11. C
12. A I think
13. B or D
Calcium has a charge of 2+ and iodine has a charge of 1-. Use the criss cross method and criss cross the charges and write them as subscripts. The formula is CaI2.