Answer:
3) Br-Br
Explanation:
Polarity occurs between Two atoms of unequal electronegativities.
since Br-Br contain only one atom ( ie.Bromine), they have equal electronegativity. So they can't be polar.
Answer:
A) fission
Explanation:
Fission reactions require a critical mass. The critical mass is necessary because it makes a fission reaction self sustaining. This critical mass is the minimum amount of material required. Nuclear fission additionally depends on the composition, purity and concentration of the fissile material. Critical mass is important in the design of nuclear warheads.
Beta decay which is also sometimes referred to as beta emission is a phenomenon in which a certain element releases an electron. For this case, each carbon has an atomic number of 6, leaving us with 8 neutrons, now, the mass number will be retained and the atomic number will be decreased by one. Thus, the answer is Boron-14.