Answer:
They are due to past earthquakes
NaBrO3 is the chemical formula for Sodium Bromate.
Answer:
3. Equal numbers of protons and neutrons
Explanation:
The nucleus becomes unstable if the ratio of protons to neutrons is less than 1:1 or more than 1:1.5.
The most stable nucleus has a neutron proton ratio of 1:1 which means that they can not release a neutron or a proton to decay.
Nucleus 3 is therefore the most stable.
MgO
MgI2
PbO2
PbI4
These are the possible compounds