In a different experiment, a student places a piece of pure ba(s) in a beaker containing 250. Ml of 6. 44mhcl(aq) and observes that the rate of appearance of h2(g) bubbles when ba(s) was added is much faster than the rate of appearance of bubbles when the mg(s) was added. The student claims that the greater reactivity is due to the difference in ionization energy between mg and ba. Explain the difference in ionization energy between mg and ba in terms of atomic structure.

Snakes, dogs, and humans have a vertebral column. snakes and dogs have tails, and humans have vestigial tailbones. dogs and humans have limbs, but snakes do not. most reptiles lay eggs, but a few give birth to live young. what do these structures suggest about the evolutionary pattern between the three organisms? 1. snakes and dogs are more closely related than snakes and humans. 2. snakes and humans are more closely related than humans and dogs. 3. dogs and humans are more closely related than snakes and humans. 4. dogs, snakes, and humans share a common ancestor. 5. the early ancestor of snakes and dogs is the same, and the early ancestor of humans is different.

Essay questions may also be referred to as a. talk questions c. hard questions b. explain questions d. think questions

Dan runs a busy desktop-publishing company. his company want to increase its exposure, so it runs a new a new promotion each week. the tool dan most likely choses to publicize this is a promotion is a