Which of the following sets of quantum numbers are correct?
| $n$ | $l$ | $m$ |
|---|---|---|
| 1 | 1 | +2 |
| $n$ | $l$ | $m$ |
|---|---|---|
| 2 | 1 | +1 |
| $n$ | $l$ | $m$ |
|---|---|---|
| 3 | 2 | $-$2 |
| $n$ | $l$ | $m$ |
|---|---|---|
| 3 | 4 | $-$2 |
In which of the following pairs, the ions are isoelectronic?
Which of the following statements concerning the quantum numbers are correct?
Arrange $s, p$ and $d$ subshells of a shell in the increasing order of effective nuclear charge ( $\left.Z_{\text {eff }}\right)$ experienced by the electron present in them.
$s$-orbital is spherical in shape, it shields the electrons from the nucleus more effectively than $p$ - orbital which in turn shields more effectively than $d$-orbital.
Therefore, the effective nuclear charge $\left(Z_{\text {eff }}\right)$ experienced by electrons present in them is $d
Show the distribution of electrons in oxygen atom (atomic number 8) using orbital diagram.
From the orbital diagram, it is seen that there are two unpaired electrons.