Aufbau Principle

If n = 6, the correct sequence for the filling of electrons will be:

1. $\mathrm{ns}$ $\stackrel{}{\to }$ $\left(\mathrm{n}-1\right)$ $\mathrm{d}$ $\stackrel{}{\to }$ $\left(\mathrm{n}-2\right)$ $\mathrm{f}$ $\stackrel{}{\to }$ $\mathrm{np}$

2. $\mathrm{ns}$ $-$ $\left(\mathrm{n}-2\right)$ $\mathrm{f}$ $\stackrel{}{\to }$ $\mathrm{np}$ $\stackrel{}{\to }$ $\left(\mathrm{n}-1\right)$ $\mathrm{d}$

3. $\mathrm{ns}$ $-$ $\mathrm{np}$ $\stackrel{}{\to }$ $\left(\mathrm{n}-1\right)\mathrm{d}$ $\stackrel{}{\to }$ $\left(\mathrm{n}-2\right)$ $\mathrm{f}$

4. $\mathrm{ns}$ $\stackrel{}{\to }$ $\left(\mathrm{n}-2\right)$ $\mathrm{f}$ $\stackrel{}{\to }$ $\left(\mathrm{n}-1\right)$ $\mathrm{d}$ $\stackrel{}{\to }$ $\mathrm{np}$

Which is the correct order of increasing energy of the listed orbitals in the atom of titanium?
1. 3s 4s 3p 3d
2. 4s 3s 3p 3d
3. 3s 3p 3d 4s
4. 3s 3p 4s 3d

How many electrons can fit in the subshell for which n = 3 and l = 1?

The element Z = 114 has been discovered recently. Family/group and electronic configuration from which it will belong are:

1. Carbon family and [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p²
2. Oxygen family and [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁴
3. Nitrogen family and [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶
4. Halogen family and [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁵

The incorrect statement among the following is:

1.	Total orbital angular momentum of an electron in 's' orbital is equal to zero.
2.	An orbital is designated by three quantum numbers, while an electron in an atom is designated by four quantum numbers.
3.	The electronic configuration of N atom is
4.	The value of m for dz2 is zero.

Which of the following is the correct arrangement of 4d, 5p, 5f, and 6p orbitals in the order of decreasing energy?