Which statement about Niels Bohr’s atomic model is true? (a)Higher orbits have lower energies.
(b)Each orbit has a specific energy level.
(c)Electrons can exist in any energy level.
(c)Orbits close to the nucleus have no energy.

Janel’s class studied properties of matter and how matter can change. janel decided she would do an experiment mixing baking soda and vinegar.question: describe the properties of baking soda and vinegar, and explain the changes that janel should see when she mixes the two types of matter. •first, identify the physical state of matter of baking soda. describe another property of baking soda. •next, identify the physical state of matter of vinegar. describe another property of vinegar. •then, explain what janel should see when she mixes the baking soda and vinegar. •describe the states of matter of the new materials that are formed. •explain how janel can be certain a change has occurred. me

Esign techniques and materials that reduce the negative environmental impact of a structure are referred to as

What’s the theoretical yield of solid lead