Answer:
I think that a pure substance is a form of matter that has a constant composition and properties that are constant throughout the sample. Mixtures are physical combinations of two or more elements and/or compounds.
Explanation:
All are CORRECT except (d)
Answer:
Yes
Explanation:
Bones sustain our bodies, and help shape our form. While very thin, the bones are large enough to bear all of our mass. Bones shield the organs of the body too. The skull supports the brain, and creates the face shape.
Mg is an element that stands for Magnesium.
Mg is the chemical symbol for Magnesium.
