Structure of Atom

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Question

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Question 1 : The increasing order (lowest first) for the values of e/m (charge/mass) for
1. e, p, n, α
2. n, p, e, α
3. n, p, α, e
4. n, α, p, e
Answer
8442

Question 2 :

The ionization enthalpy of hydrogen atom is 1.312 × 10⁶ J mol^-1. The energy required to excite the electron in the atom from n = 1 to n = 2 is

1. 8.51 × 10⁵ J mol^-1
2. 6.56 × 10⁵ J mol^-1
3. 7.56 × 10⁵ J mol^-1
4. 9.84 × 10⁵ J mol^-1
Answer
8443

Question 3 : or a given principal level n = 4, the energy of its subshells is in the order
1. s < p < d < f
2. s > p > d > f
3. s < p < f < d
4. f < p < d < s
Answer
8444

Question 4 : A gas absorbs a photon of 355 nm and emits at two wavelengths. If one of the emissions is at 680 nm, the other is at:
1. 518 nm
2. 1035 nm
3. 325 nm
4. 743 nm
Answer
8445

Question 5 : Which of the following statements in relation to the hydrogen atom is correct?
1. 3s orbital is lower in energy than 3p orbital
2. 3p orbital is lower in energy than 3d orbital
3. 3s and 3p orbitals are of lower energy than 3d orbital
4. 3s, 3p and 3d orbitals all have the same energy
Answer
8446