What is the oxidation state of a lone element? O A. It is its most likely oxidation state.
O B. It is always 1.
O C. It is always 0.
O D. It is the same as in a compound.

The oxidation state of hydrogen is +1 in its compounds, except for metal hydrides, such as NaH, LiH, etc., in which the oxidation state for H is -1. The oxidation states of other elements are then assigned to make the algebraic sum of the oxidation states equal to the net charge on the molecule or ion.

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.