K has a larger atomic radius than Li. This is because atomic radius generally increases down a group in the periodic table, so potassium (K) being below lithium (Li) in Group 1 will have a larger atomic radius.
Potassium has the largest atomic radius.
The neutral atom of potassium has the largest radius.
K+
K+ has larger radius
Rb+ has a smaller radius than K+ due to increased effective nuclear charge in rubidium. Therefore, K+ has a smaller radius than Rb.
Look at your periodic table and you will see that K, potassium, must have the largest radius of these choices. You know that, K + and Na + will be small in radius because they have donated an electron to become positively charged cations.
The volume will be 5723 assuming that the balloon's elasticity makes no difference.
Postassium, K, has a larger radius than sodium, Na, because it is in the next period on the table but in the same group as sodium.
The largest radius among the options provided.
When there is an anion (negative charge) the radius will be larger because it is more full whereas it will be smaller if it is a positive charge because of less electrons. ex largest to smallest radius (K-,K, K+)
Francium (Fr) down a group, the radius increases.