Chemistry Questions: Which of the following is a reasonable ground-state electron configuration?

-1s21p62s22p63s2
-1s22s22p63s23p64s24d8
-1s22s22p63p6
-1s22s22p63s1

Question

Chemistry Questions: Which of the following is a reasonable ground-state electron configuration?  

-1s21p62s22p63s2
-1s22s22p63s23p64s24d8
-1s22s22p63p6
-1s22s22p63s1<< My guess

Which of the following is a possible noble gas notation?  

-[Xe] 6s26p6
-[Kr] 5s25d85p6
-[Xe] 6s25d106p4
-[Kr] 5s24d105p3 <<My guess

im stuck on these last two Chemistry questions, can anyone help?

anonymous · Answer

-1s22s22p63s1<< My guess==== is right answer.

anonymous · Answer

ur 1st guess is correct but 2 nd one is wrong

anonymous · Answer

noble gas have complete config....i mean np^6

anonymous · Answer

so B?

anonymous · Answer

i did not understand 2nd question.

anonymous · Answer

-[Kr] 5s25d85p6

it shuld be 5s^2 4d^10

anonymous · Answer

noble gases have there full outermost shell.

anonymous · Answer

maybe?

anonymous · Answer

what do you mean by 2nd question?

anonymous · Answer

there are two questions posted

anonymous · Answer

I got b for the answer, is that right?

anonymous · Answer

do you correcrt electronic configuration of XE or KR?

anonymous · Answer

The correct answer is [Kr] 5s24d105p6

i finished the test and that was the right answer