19. How many atoms are there in the following reaction? Zn + 2NacI———>
ZnCl2 + 2Na
b) 11
c) 12
d) none of the above

Identify one disadvantage to each of the following models of electron configuration: dot structures arrow and line diagrams written electron configurations type in your answer below.

How is energy related to the change of state represented by the model? atoms gain energy as a solid changes to a liquid. atoms gain energy as a solid changes to a gas. atoms lose energy as a solid changes to a liquid. atoms lose energy as a solid changes to a gas.

Which of the following words describe the reality that the universe looks the same from various perspective