Answer:
Iodine, Silicon, Copper.
Explanation:
Iodine is an insulator, which doesn't conduct electricity. Silicon is a semiconductor. Copper is a conductor.
Answer:
Atomic models are important because, they help us visualize the interior of atoms and molecules, and thereby predicting properties of matter.
Explanation:
We study the various atomic models in our course of study because, it is important for us to know, how did people come to the present concept of an atom. How did physics evolve from classical to quantum physics.
All these are important for us to know and thus, knowledge about various atomic models, their discoveries and drawbacks and finally improvements based on scientific evidence present at that time is important for us to understand the underlying theory very well.
Answer:
the first one is just water and the second one is gas
Explanation:
7. a. I
8. c. 75 g/ml
9. b. .25g/cm3
10. b. the density decreases
