Which of these hypothesis is not falsifiable? a. there is life on other planets.
b. our sun will burn out within the next billion years.
c. the universe is stagnant.
d. jupiter is the best planet in our solar system.

Which of the following elements would you expect to have the highest ionization energy value, and why? a. chlorine (cl), because it has a low effective nuclear charge and large radius b. fluorine (f), because it has a large radius and naturally forms a negative ion c. lithium (li), because it has a small radius and naturally forms a positive ion d. neon (ne), because it has a high effective nuclear charge and small radius