[penileCucumber]

Looking across period 4 of the periodic table, potassium (atomic number 19) is followed by calcium (atomic number 20), which is followed by scandium (atomic number 21). Which element should have the largest atomic radius?
1.potassium
2.calcium
3.scandium
4.All three have the same atomic radius

As great as it would be to actually learn this, realistically i dont care. All i want is the answer so i can move on! Thanks

 

[Borek]

realistically i dont care. All i want is the answer so i can move on!

Then just google their sizes.

[vansh123]

Potassium >Calcium> Scandium

As you move across a period ( from left to right )
the atomic radius gets smaller because the force of attraction grows between the nucleus and the outermost electron