Answer:
Potassium (K)
Explanation:
The element with oxidation number of +1 is potassium.
Every element in the first group on the periodic table has an oxidation number of +1.
- They are a group of metals known as the alkali metals.
- When they combine with other atoms, they prefer to lose an electron to form the bonds.
- A loss of an electron will give them a complete octet in their atomic structure.
