Question

correct order of radius of the first orbit of Hydrogen Helium + Ion Lithium 2 + Ion berilium 3 + ion is​

Answer 1

Answer:

Be3+ ∠ Li2+ ∠ He+ ∠ H

Explanation:

the cationic radii is inversely proportional to the charge of the cation

Ok for your conceptual understanding

when the electronic charge decreases the nuclear attraction increases rsulting a decrease in the radii

Answer 2

Answer:

H>He ^ +>Li ^ 2+> Be^  3+  

Explanation:

• These all are isoelectronic species
• They have same number of electrons
• With increase in the atomic number (from H to Be), the effective nuclear charge increases
• Hence, the electron is pushed inside.
• This decreases the radius.