A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms
The answer is B.
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I believe the answer is 3 - He hypothesized that all substances can be broken down into a smallest part called the atom.
Answer:
Aluminium was named after alum, which is called 'alumen' in Latin. This name was given by Humphry Davy, an English chemist, who, in 1808, discovered that aluminium could be produced by electrolytic reduction from alumina (aluminium oxide), but did not manage to prove the theory in practice.
Explanation: