I think the answer is a, volume, but I still might be wrong.
#protactinium
- It lies in 7th period having Z=91
The outer electronic configuration is 6d^17s^2
- d-block element(transition)
So it will form polar covalent bond (2)
#Francium
Outer electronic configuration 7s^1
It will form ionic bond (3)
Answer:
Spring tides are extremely high and extremely low. This is created when the sun and moon pull together.
Explanation:
The in the very definition of 'economics' explains why. Since, economics is a social science that studies human behaviour, is a relationship *BETWEEN* ends and scarce means..
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'ends' that is goals, and "scarce means" referred to the resources. So that is the economic problem, that there are *unlimited* wants but scarce resources. So the answer to this question is just: All goals cannot be reached because there are unlimited "goals", and few/limited resources.</span>
