Exothermic. The reaction of the two elements form the compound iron sulfide.
Answer:
Formation of precipitate
Explanation:
Liquid react with liquid to form solid
The trend of atomic radius in the periodic table is increasing from right to left and from top to bottom. In reference to the table, oxygen has smaller radius compared to carbon, which is smaller than aluminum and which is also smaller than potassium. Thus, the trend from smallest to biggest is oxygen carbon, aluminum and potassium.
In 1869, just five years after John Newlands put forward his law of octaves, a Russian chemist called Dmitri Mendeleev published a periodic table. Mendeleev also arranged the elements known at the time in order of relative atomic mass, but he did some other things that made his table much more successful.
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Explanation:
electrons in the highest energy orbitals which are able to contribute to Bonding are valence electrons,....... please mark me brainiest
