12.1 Electrons in Atoms

1 2 3 4 5

Question 1

Marks: 1

Which statement is true about the spectra shown? hydrogen-spectrum-hl

All the lines in R have the same energy
Q and S could represent line emission spectra
Only S could represent a line emission spectrum for hydrogen
P indicates the element has 4 pairs of electrons at different energy levels

Key Concepts

Convergence Limits on an Emission Spectrum

Question 2

Marks: 1

The energy absorbed at the limit of convergence for helium is 19.6 x 10^-18 J per atom.

Which calculation would be used to calculate the wavelength, in m, for this electron transition?

(c = 3.00 x 10⁸ ms^-1, h = 6.63 x 10^-34 Js)

λ = $\frac{19.6 \times 10^{- 18} \times 3.00 \times 10^{8}}{6.63 \times 10^{- 34}}$
λ = $\frac{3.00 \times 10^{8} \times 6.63 \times 10^{- 34}}{19.6 \times 10^{- 18}}$
λ = $\frac{19.6 \times 10^{- 18} \times 6.63 \times 10^{- 34}}{3.00 \times 10^{8}}$
λ = $\frac{3.00 \times 10^{8}}{19.6 \times 10^{- 18} \times 6.63 \times 10^{- 34}}$

Key Concepts

Calculating First Ionisation Energy

Question 3

Marks: 1

The first ionisation energies (in kJ mol^-1) of five successive elements are:

2081, 496, 738, 578, 787

What could these elements be?

First five elements in a period
Second to the sixth elements in a period
Last four elements of one period and the first one of the next period
Last element of one period and the first four elements of the next period

Key Concepts

Trends Across a Period

Question 4

Marks: 1

A period 3 element forms an oxide M₂O₃.

Which represents the first four successive ionisation energies of M?

Ionisation energy / kJmol^-1

	First	Second	Third	Fourth
A.	496	4560	6940	9540
B.	578	1820	2740	11600
C.	1012	1907	2914	4964
D.	736	1450	7740	10500

Key Concepts

Successive Ionisation Energies
Deducing the Group

Question 5

Marks: 1

Between which ionisation energies of silicon will there be the greatest difference?

Between the second and fourth ionisation energies
Between the first and third ionisation energies
Between the fourth and fifth ionisation energies
Between the fifth and sixth ionisation energies

Key Concepts

Successive Ionisation Energies

DP IB Chemistry: HL

Topic Questions

12.1 Electrons in Atoms

Question 1

Key Concepts

Question 2

Key Concepts

Question 3

Key Concepts

Question 4

Key Concepts

Question 5

Key Concepts

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