How long after the northern kingdom's captivity did Judah go into captivity?
Roughly 150 years after the northern kingdom (Israel) was taken into captivity and its land left a wasteland, Judah went into captivity. The same history indicates Judah's turn came about 150 years later.
Les explains that after the northern kingdom was taken into captivity and its territory became a wasteland, about 150 years passed. Then Judah's turn came. Judah too had gone into abject idolatry, and for that reason the account goes to the last chapter of 2 Chronicles.