Answer:
Combustion is a chemical reaction in which a substance reacts with air to form energy.
Explanation:
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The apparent topography exhibited by minerals in thin section as a consequence of refractive index.
Answer:
B and D as well
Explanation:
All the electronic configuration of the elements of B end on s sub shell.
S energy level sub shell can hold 2 electrons and since Be, Mg, Ca Sr end in s.
We can say, they have same valence electrons, i.e 2 electrons.
I maybe wrong but i believe 36
