what is the definition of a lewis base?\n a substance that donates a proton\n a substance that donates…

what is the definition of a lewis base?\n a substance that donates a proton\n a substance that donates electrons to form a covalent bond\n a substance that accepts electrons to form a covalent bond\n a substance that when dissolved in water increases hydrogen ion concentration
Answer
Brief Explanations:
A Lewis base is defined as a substance that donates a pair of electrons to form a covalent bond. A substance that donates a proton is a Brønsted - Lowry acid. A substance that accepts electrons to form a covalent bond is a Lewis acid. A substance that when dissolved in water increases hydrogen - ion concentration is an Arrhenius acid.
Answer:
a substance that donates electrons to form a covalent bond