Answer:
Mendeleev left spaces in his periodic table because he predicted there were elements that weren't discovered yet that would fit in these spaces.
Explanation:
Answer:
Because the rock underwent lava and heat/pressure transformation. They are cooled and heated by magma, and then under go pressure. No fossils would be found in those.
Explanation:
Hope this helps! :)
Minerals are inorganic and coal is made of decomposed plants, which are organic
C I think not sure give it a try
