What is the role of these bacteria in the nitrogen cycle??

A- to absorb nitrogen-containing compounds from the soil.

B- to release free nitrogen into the atmosphere.

C-To break down nitrogen-containing compounds in dead organisms.

D- to convert free nitrogen into usable nitrogen.

in this excerpt from "a wedding gift," the scene is an example of the theme of tragedy because the infant's mother has just died.

indium, and thallium have three electrons i think

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8