Answer:
Groups
Explanation:
Elements with the same number of valence electrons are found in the same column(group) of the Periodic Table.
Answer : When the nuclear reaction produces too many neutrons.
Explanation : In a nuclear fission reactor where the reaction is controlled by regulating the number of neutrons produced by the chain reaction. Production of too many neutrons may cause an accelerated uncontrolled chain reaction which may cause enormous heat to be generated in a very short period of time inside the reactor which may result into an explosion.
For, this purpose control rods, made of neutron absorbing species, like cadmium, are placed in the nuclear reactors to control the excess number of neutrons at any point of reaction when required.
Answer:
The transformation was not added. See the attached file for the structure and the answer.
Explanation:
In the first reaction it is normal nucleophilic substitution reaction on the addition of hydrobromide. Hindu second reaction first the Hydroxide Ion attacks on the tertiary carbon because it is more reactive then the anion formed is further converted into carbonyl. And on the addition of methyl iodide we get the required product.
CO2 is carbon dioxide which is most famous for being in gas form so i would figure if it was exposed to freezing temperatures it would turn into a liquid then maybe a solid<span />
