Radius of a Bohr orbit of a hydrogen-like species (r proportional to n^2/Z)

1. A.
   $r_{4} = \frac{9}{16}r_{3}$
2. B.
   $r_{4} = \frac{16}{9}r_{3}$
3. C.
   $r_{4} = \frac{3}{4}r_{3}$
4. D.
   $r_{4} = \frac{4}{3}r_{3}$

Tap an option to check your answer.

1. A.
   $\frac{27}{16}x$
2. B.
   $\frac{4}{9}x$
3. C.
   $\frac{9}{4}x$
4. D.
   $\frac{16}{27}x$

Tap an option to check your answer.

1. A.
   $r = \frac{a_{0}}{2}$
2. B.
   $r = \frac{a_{0}}{4}$
3. C.
   $r = 4a_{0}$
4. D.
   $r = 2a_{0}$

Tap an option to check your answer.

1. A.
   Radius of $3^{\text{rd}}$ orbit is nine times larger than that of $1^{\text{st}}$ orbit.
2. B.
   Radius of $8^{\text{th~}}$ orbit is four times larger than that of $4^{\text{th~}}$ orbit.
3. C.
   Radius of $6^{\text{th}}$ orbit is three times larger than that of $4^{\text{th}}$ orbit.
4. D.
   Radius of $4^{\text{th~}}$ orbit is four times larger than that of $2^{\text{nd~}}$ orbit.

Tap an option to check your answer.

1. A.
   (A) and (C) Only
2. B.
   (A) and (E) Only
3. C.
   (B) and (E) Only
4. D.
   (C) and (D) Only

Tap an option to check your answer.

1. A.
   ${Li}^{2 +},3$
2. B.
   ${He}^{+},3$
3. C.
   ${He}^{+},2$
4. D.
   ${Li}^{2 +},2$

Tap an option to check your answer.