When nuclear fission a. it must be initiated by bombardment with neutrons. b. two nuclei combine to produce a heavier nucleus. c. it is a spontaneous reaction. d. the chain reaction that results cannot be controlled.

Nuclear fission is a process in which a heavy nucleus is broken down into lighter nuclei.

Within a nucleus, the subatomic particles are held together by very strong forces of attraction. Neutrons which have the mass of a proton but no nuclear charges, is used to initiate fission reactions.

For example: The fission of U-235 into Barium (Ba-144) and Krypton (Kr- 89) is initiated by bombardment with neutron

₉₂U²³⁵ + ₀n¹   ⇒    ₉₂U²³⁶            

₉₂U²³⁶  ⇒      ₅₆Ba¹⁴⁴ + ₃₆Kr⁸⁹ + 3₀n¹

Ans) A

Nuclear fission is a process in which a heavy nucleus is broken down into lighter nuclei.

Explanation:

a sequence is a function whose domain is the set of natural numbers.

natural numbers are all the negative and positive integers

alienation, transformation, consumption, and the relativity of truth.

you can choose any one of these, they are all important themes.

these themes reflect the distinct sensibilities of both the modernist and postmodern aesthetic movements. (from google, you should paraphrase)

hope this !

- melanie