Chemistryhard · Past Paper
Which element has the electronic configuration \(1s^2 2s^2 2p^6 3s^2 3p^1\)?
AMagnesium
BAluminium
CSilicon
DSodium
✓ Correct Answer: B — Aluminium
The total number of electrons is 13 (2+2+6+2+1), which is the atomic number of Aluminium.
Share this question
More from Chemistry
- The bond angle in a methane molecule (CH4) is approximately:
- In the reaction $I_2 + 2S_2O_3^{2-} \rightarrow 2I^- + S_4O_6^{2-}$, iodine is acting as a/an:
- Which of the following is an example of a photochemical reaction?
- What is the atomic number of carbon?
- What is the sign of ∆H (change in enthalpy) for an endothermic reaction?