I believe those are Divine Providence nuns. The second one from the left looks like the nun who taught me Chemistry at St. Basil’s in Pittsburgh.
Sister Rosaria, I think. “Always remember your valences,” she used to beat into our little minds...
We had our 45th reunion 3 years ago. Sister Rosaria was there. Well into her 90’s.
Rule #3:
KEEP YOUR FINGER OFF THE TRIGGER UNTIL READY TO FIRE SISTER!
I love it!