Element with symbol Pa and atomic number of 91.
1
He did better'n this in Castlemaine; and I'd pa behind me there.
2
Mimi went to confer with Great-pa for a minute, then came back.
3
Making sure they don't waste your pa's time and money, that's all.
4
And then the Humane society had pa arrested for cruelty to animals.
5
What mule ever had another mule for a ma or a pa?'
1
A 231Pa reference material has been characterized for amount of protactinium.
2
Scuffles soon arose over who'd first bagged hafnium, protactinium, and technetium.
3
This addition of a proton shifts it to the next element on the table, protactinium-233.
4
They rechristened it protactinium, or "parent of actinium," the element into which it (eventually) decayed.
5
This is also unstable, so the protactinium spits out another electron and transforms into what you started with, uranium-233.