Electron configurations of atoms and ions

Chemia IBPaper 2, maj 2026, TZ3wzorowane5 pktotwarteśrednie (szac.)

Zadanie 1a

(i) Magnesium burns in oxygen according to the equation $\ce{Mg(s) + 1/2 O2(g) -> MgO(s)}$. Explain, using electron configurations, how ions are formed by magnesium and oxygen and how these ions form a compound. (ii) Explain, using electron configurations, why…

Chemia IBPaper 2, maj 2026, TZ1wzorowane5 pktobliczenioweśrednie (szac.)

Zadanie 2a

(i) State the number of protons, electrons and neutrons in $\ce{^{85}Rb+}$. (ii) State the full electron configuration for $\ce{^{85}Rb+}$. (iii) The relative atomic mass, A_r, of Rb is 85.47. Determine the relative mass of the first isotope of Rb to four…

• Tabela do uzupełnienia

Chemia IBPaper 1A, maj 2026, TZ2wzorowane1 pktzamknięteśrednie (szac.)

Zadanie 3

Which species has the ground state electron configuration [Ar] 3d⁸? A. Cu²⁺ B. Zn²⁺ C. Ni D. Ni²⁺

Chemia IBPaper 1A, maj 2025, TZ1wzorowane1 pktzamknięteśrednie (szac.)

Zadanie 2

The letters below stand for four species, not for element symbols. Which pair of species has an identical number of outer-shell electrons? $\ce{^{31}_{15}J^{2-}}$, $\ce{^{40}_{18}L^{+}}$, $\ce{^{39}_{19}M^{+}}$, $\ce{^{32}_{16}Q^{2+}}$ A. J and M B. L and Q C.…

Chemia IBPaper 2, maj 2025, TZ1wzorowane1 pktotwartełatwe (szac.)

Zadanie 2a

Deduce the electron configuration of the Fe³⁺ ion.

Chemia IBPaper 1A, maj 2025, TZ1wzorowane1 pktzamkniętełatwe (szac.)

Zadanie 3

Which diagram shows the electron configuration of an oxygen atom in its ground state? A. Diagram A B. Diagram B C. Diagram C D. Diagram D

• Materiał graficzny

Chemia IBPaper 2, maj 2025, TZ3wzorowane6 pktotwarteśrednie (szac.)

Zadanie 7a

(i) State the electron configuration of a nitrogen atom. (ii) Draw the Lewis formula of ammonia. (iii) Deduce the electron domain geometry and the molecular geometry of the ammonia molecule. (iv) Explain why the ammonia molecule is polar.

Chemia IBPaper 1A, maj 2025, TZ3wzorowane1 pktzamkniętełatwe (szac.)

Zadanie 12

Which electron configuration is correct for a chromium atom, Cr, in its ground state? A. [Ar] 4s¹ 3d⁵ B. [Ar] 4s² 3d⁴ C. [Ar] 3d⁶ D. [Ar] 4s² 4d⁴

Chemia IBPaper 2, listopad 2025, TZ1wzorowane6 pktotwarteśrednie (szac.)

Zadanie 1a

(i) The boxes for the 1s and 2s orbitals of a sulfur atom are shown below. Draw the remaining orbitals needed for its ground-state electron configuration, filling and labelling each one. Use section 7 of the data booklet. (ii) For a sulfur atom, sketch the…

• Materiał graficzny

Chemia IBPaper 1A, listopad 2025, TZ1wzorowane1 pktzamkniętełatwe (szac.)

Zadanie 3

The diagrams show the 3s and 3p sublevels of a sulfur atom; the inner sublevels are full. Which diagram represents the ground-state electron configuration, in agreement with the Pauli exclusion principle and Hund's rule? A. Diagram A B. Diagram B C. Diagram C…

• Materiał graficzny

Chemia IBPaper 2, maj 2024, TZ2wzorowane2 pktotwartełatwe (szac.)

Zadanie 2a

Give the full electron configuration of a nitrogen atom in its ground state and state how many of its electrons are unpaired.

Chemia IBPaper 2, maj 2024, TZ1wzorowane1 pktotwartełatwe (szac.)

Zadanie 5a

State the electron configuration of a phosphorus atom, P.

Chemia IBPaper 3, maj 2023, TZ1wzorowane1 pktotwartełatwe (szac.)

Zadanie 1c

The first electron affinity of magnesium is positive. Sketch the 3s and 3p orbital filling diagram of the species formed when one electron is added to a gaseous magnesium atom.

• Materiał graficzny

Chemia IBPaper 3, maj 2023, TZ2wzorowane1 pktotwarteśrednie (szac.)

Zadanie 1f

Suggest, giving one reason, whether the volume of a single atom could ever be known exactly.

Chemia IBPaper 2, maj 2023, TZ1wzorowane3 pktotwartełatwe (szac.)

Zadanie 2a

(i) Annotate and label the ground state orbital diagram of carbon below, using arrows to represent electrons. (ii) Sketch the shapes of the two types of occupied orbital identified in part (i) on the axes below, and state the orbital type for each.

• Materiał graficzny

Chemia IBPaper 2, maj 2023, TZ2wzorowane1 pktotwarteśrednie (szac.)

Zadanie 4e

State the full electron configuration of the nickel(II) ion, Ni²⁺.

Chemia IBPaper 1, maj 2023, TZ2wzorowane1 pktzamkniętełatwe (szac.)

Zadanie 5

Which diagram shows the ground-state electron configuration of the 3s and 3p sublevels of a phosphorus atom, 3s² 3p³? A. Diagram A B. Diagram B C. Diagram C D. Diagram D

• Materiał graficzny

Chemia IBPaper 1, maj 2023, TZ2wzorowane1 pktzamknięteśrednie (szac.)

Zadanie 7

Which is the electron configuration of an atom of an element in group 14, period 4? A. [Ar] 4s² 3d² B. [Ar] 4s² 3d¹⁰ 4p² C. [Ne] 3s² 3p² D. [Ar] 4s² 3d¹⁰ 4p⁴

Chemia IBPaper 1, maj 2023, TZ1wzorowane1 pktzamknięteśrednie (szac.)

Zadanie 9

An element has the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁴. How many electrons are gained or lost when an atom of this element forms an ionic bond? A. Four electrons lost B. Two electrons lost C. Four electrons gained D. Two electrons gained

Chemia IBPaper 1, listopad 2023, TZ1wzorowane1 pktzamknięteśrednie (szac.)

Zadanie 6

Which electron configuration is the ground-state configuration of an atom of a d-block element? A. 1s²2s²2p⁶3s²3p⁶4s²3d⁴ B. 1s²2s²2p⁶3s²3p⁶4s¹3d⁵ C. 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p¹ D.…

Chemia IBPaper 1, listopad 2023, TZ2wzorowane1 pktzamknięteśrednie (szac.)

Zadanie 6

Which electron configuration represents an atom of a d-block element in its ground state? A. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d⁶ B. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² C. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁶ D.…

Chemia IBPaper 2, maj 2022, TZ1wzorowane1 pktotwartełatwe (szac.)

Zadanie 2a

Complete the boxes with arrows to show the ground-state electron configuration of an oxygen atom.

• Materiał graficzny

Chemia IBPaper 1, maj 2022, TZ1wzorowane1 pktzamkniętełatwe (szac.)

Zadanie 6

What is the maximum number of electrons that can occupy a single orbital of the 4d sublevel? A. 2 B. 5 C. 10 D. 14

Chemia IBPaper 1, maj 2022, TZ1wzorowane1 pktzamkniętełatwe (szac.)

Zadanie 8

Which is the electron configuration of an atom of a metallic element? A. [He] 2s² 2p³ B. [Ne] 3s² 3p⁵ C. [Ar] 3d⁶ 4s² D. [Ar] 3d¹⁰ 4s² 4p⁴

Chemia IBPaper 2, listopad 2022wzorowane5 pktotwarteśrednie (szac.)

Zadanie 2e

Compound P can be synthesized by reacting 4,6-dichloroquinazoline with another reactant, B. (i) Deduce the structure of B. (ii) The reaction can be catalysed by copper(I) iodide, CuI. State the ground-state electron configuration of the Cu⁺ ion.…

• Materiał graficzny

Chemia IBPaper 2, listopad 2022wzorowane1 pktotwartełatwe (szac.)

Zadanie 3a

State the ground-state electron configuration for Ni²⁺.