It’s earthquakes
hope that helps
Answer:
Oxide of manganese, Potassium permanganate, Manganese bromide and manganese oxide.
Explanation:
1. Manganese dioxide
Its chemical formula is
. It is +4 oxidation state. It is a black solid which is fairly stable.
2. Potassium permanganate
Its chemical formula is
. It is commonly used in the laboratories as oxidizing agent. They appear black in color.
3 Manganese bromide
Its chemical formula is 
4. Oxides of manganese
Chemical formula is 
The most stable state of Manganese is +2 oxidation state.
405 PHz
I might be wrong because that might be for 0.74 nm. We will see with out people answers
Nobelium discovered in Berkeley California