What element in group 6 has 3 shells/energy levels around the nucleus A. oxygen
b. selenium
c. thallium
d. sulfur

(Please do not anwser if you do not know for sure, thank you!.)

Which of these is an example of pseudoscience? a) predicting the time of sunrise based on data on position of earth b) predicting the date of the moon phases based on data on position of earth c) predicting eclipses based on the position of the sun and the moon d) predicting future events in a person's life based on the position of the moon