Structure of Atom

1. A.
   $6.565 \times 10^{-5}$ cm
2. B.
   $3.647 \times 10^{-5}$ cm
3. C.
   $4.377 \times 10^{-5}$ cm
4. D.
   $1.824 \times 10^{-5}$ cm

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1. A.
   $-\dfrac{E}{2}$ J
2. B.
   $-\dfrac{E}{4}$ J
3. C.
   $-\dfrac{E}{9}$ J
4. D.
   $-\dfrac{E}{16}$ J

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1. A.
   52.9 pm
2. B.
   105.8 pm
3. C.
   238.1 pm
4. D.
   423.2 pm

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1. A.
   $\mathrm{Na^+, Cl^-, O^-, NO^+}$
2. B.
   $\mathrm{N_2O, N_2O_4, NO^+, NO}$
3. C.
   $\mathrm{Na^+, Mg^{2+}, O^-, F^-}$
4. D.
   $\mathrm{Ca^{2+}, Ar, K^+, Cl^-}$

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1. A.
   $434$ nm
2. B.
   $486$ nm
3. C.
   $656$ nm
4. D.
   $410$ nm

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1. A.
   $4.0 \times 10^{14}$ Hz
2. B.
   $5.4 \times 10^{14}$ Hz
3. C.
   $7.5 \times 10^{14}$ Hz
4. D.
   $4.7 \times 10^{14}$ Hz

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1. A.
   $3,\ 2,\ 1,\ +1/2$
2. B.
   $3,\ 2,\ 0,\ +1/2$
3. C.
   $3,\ 1,\ 0,\ +1/2$
4. D.
   $3,\ 0,\ 1,\ +1/2$

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1. A.
   $4.22 \times 10^{-34}$ JS
2. B.
   $2.6504 \times 10^{-34}$ JS
3. C.
   $3.313 \times 10^{-34}$ JS
4. D.
   $1.325 \times 10^{-34}$ JS

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1. A.
   $2$ and $3$
2. B.
   $3$ and $2$
3. C.
   $1$ and $5$
4. D.
   $2$ and $4$

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1. A.
   ${}^{3}\mathrm{He}_2$ and ${}^{4}\mathrm{He}_2$
2. B.
   ${}^{24}\mathrm{Mg}_{12}$ and ${}^{25}\mathrm{Mg}_{12}$
3. C.
   ${}^{40}\mathrm{K}_{19}$ and ${}^{40}\mathrm{Ca}_{20}$
4. D.
   ${}^{40}\mathrm{K}_{19}$ and ${}^{39}\mathrm{K}_{19}$

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