Question

element which can accept as well as donate one electron​

Answer 1

Answer:

Substances have different tendencies to donate or accept electrons. When a really good donor meets a great acceptor, the chemical reaction releases a lot of energy. Oxygen (O2) is the best electron acceptor and is used in many aerobic reactions (reactions with oxygen). Hydrogen gas (H2) is a good electron donor.

Answer 2

Hydrogen
It can accept electron to gain stability in configuration-ie.,H-
& it can donate an electron to become H+ ion