Answer:
Table salt has a uniform and definite composition. It is not a mixture because the sodium and the chlorine are chemically bonded, meaning you cannot take the sodium out of the chlorine or vice versa.
Explanation:
All samples of salt are chemically identical, whereas a mixture can vary. For example, salt water is a mixture because you can have differing amounts of salt or water. The composition is not the same all the way throughout.
I believe both C) and D) are correct, because both have enough electrons to show that the element has enough protons to be a transition metal, and both elements seem to have an electron configuration that exists in the ground state. We may need more information.
46. F the mouth.
Because the mouth works as the food smasher and with the addition of saliva the food will be softer to digest.
47. D The Weight
Because weight is mass times the acceleration of gravity and acceleration of gravity is different on moon 1.620 m/s^2.
48.G Two elements
Because compounds are made of two or more than two elements.