Answer:
A
an element made of carbon and oxygen atoms.
In 1871, a Russian Chemist, Dimitri Mendeleev, gave a useful scheme for classification of elements. He presented the first regular periodic table in which elements of similar chemical properties were arranged in eight vertical columns called groups. The horizontal rows of table were called periods. He arranged elements in ascending order of their atomic masses and found that elements having similar chemical properties appeared at regular intervals. This observation was called Periodic Law.
<span>Definition of Metallurgy-The branch of science and technology concerned with the properties of metals and their production and purification.</span>
B.) When atoms share electrons/......
