DP Chemistry (first assessment 2025)

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Structure 3. Classification of matter » Structure 3.1—The periodic table: Classification of elements » Structure 3.1.3—Periodicity refers to trends in properties of elements across a period and down a group.

Structure 3.1.3—Periodicity refers to trends in properties of elements across a period and down a group.

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Directly related questions

22N.1A.SL.TZ0.8: Which property of elements increases down a group but decreases across a period? A. Atomic...
22N.1A.SL.TZ0.8: Which property of elements increases down a group but decreases across a period? A. Atomic...
19M.1A.SL.TZ1.7: Which series represents atoms in order of decreasing atomic radius? A. N > C > Be >...
19M.1A.SL.TZ1.7: Which series represents atoms in order of decreasing atomic radius? A. N > C > Be >...
19M.1A.SL.TZ1.7: Which series represents atoms in order of decreasing atomic radius? A. N > C > Be >...
19M.1A.SL.TZ1.7: Which series represents atoms in order of decreasing atomic radius? A. N > C > Be >...
19M.1A.SL.TZ2.7: How do the following properties change down Group 17 of the periodic table?
19M.1A.SL.TZ2.7: How do the following properties change down Group 17 of the periodic table?
19M.1A.SL.TZ2.7: How do the following properties change down Group 17 of the periodic table?
19M.1A.SL.TZ2.7: How do the following properties change down Group 17 of the periodic table?
19M.1A.SL.TZ1.8: What are typical characteristics of metals?
19M.1A.SL.TZ1.8: What are typical characteristics of metals?
19M.1A.SL.TZ1.8: What are typical characteristics of metals?
19M.1A.SL.TZ1.8: What are typical characteristics of metals?
19M.1A.SL.TZ2.8: How do the following properties change down Group 17 of the periodic table?
19M.1A.SL.TZ2.8: How do the following properties change down Group 17 of the periodic table?
19M.1A.SL.TZ2.8: How do the following properties change down Group 17 of the periodic table?
19M.1A.SL.TZ2.8: How do the following properties change down Group 17 of the periodic table?
19M.2.SL.TZ2.3b(iii):
Predict, giving two reasons, how the first ionization energy of ¹⁵N compares with that of ¹⁴N.
19M.2.SL.TZ2.3b(iii):
Predict, giving two reasons, how the first ionization energy of ¹⁵N compares with that of ¹⁴N.
19M.2.SL.TZ2.b(iii):
Predict, giving two reasons, how the first ionization energy of ¹⁵N compares with that of ¹⁴N.
19M.2.SL.TZ2.4b(i):
Suggest the basis of these predictions.
19M.2.SL.TZ2.4b(i):
Suggest the basis of these predictions.
19M.2.SL.TZ2.b(i):
Suggest the basis of these predictions.
19M.2.SL.TZ2.4b(i):
Suggest the basis of these predictions.
19M.2.SL.TZ2.4b(i):
Suggest the basis of these predictions.
19M.2.SL.TZ2.b(i):
Suggest the basis of these predictions.
19M.2.SL.TZ2.3b(iii):
Predict, giving two reasons, how the first ionization energy of ¹⁵N compares with that of ¹⁴N.
19M.2.SL.TZ2.3b(iii):
Predict, giving two reasons, how the first ionization energy of ¹⁵N compares with that of ¹⁴N.
19M.2.SL.TZ2.b(iii):
Predict, giving two reasons, how the first ionization energy of ¹⁵N compares with that of ¹⁴N.
19M.2.SL.TZ2.4a:
Before its isolation, scientists predicted the existence of rhenium and some of its properties.

Suggest the basis of these predictions.
19M.2.SL.TZ2.4a:
Before its isolation, scientists predicted the existence of rhenium and some of its properties.

Suggest the basis of these predictions.
19M.2.SL.TZ2.a:
Before its isolation, scientists predicted the existence of rhenium and some of its properties.

Suggest the basis of these predictions.
19M.2.SL.TZ2.4a:
Before its isolation, scientists predicted the existence of rhenium and some of its properties.

Suggest the basis of these predictions.
19M.2.SL.TZ2.4a:
Before its isolation, scientists predicted the existence of rhenium and some of its properties.

Suggest the basis of these predictions.
19M.2.SL.TZ2.a:
Before its isolation, scientists predicted the existence of rhenium and some of its properties.

Suggest the basis of these predictions.
19N.1A.SL.TZ0.7: Which property shows a general increase from left to right across period 2, Li to F? A. Melting...
19N.1A.SL.TZ0.7: Which property shows a general increase from left to right across period 2, Li to F? A. Melting...
19N.1A.SL.TZ0.7: Which property shows a general increase from left to right across period 2, Li to F? A. Melting...
19N.1A.SL.TZ0.7: Which property shows a general increase from left to right across period 2, Li to F? A. Melting...
20N.1A.SL.TZ0.7:
Which of the following shows a general increase across period 3 from $Na$ to $Cl$ ?

A. Ionic radius

B. Atomic radius

C. Ionization energy

D. Melting point
20N.1A.SL.TZ0.7:
Which of the following shows a general increase across period 3 from $Na$ to $Cl$ ?

A. Ionic radius

B. Atomic radius

C. Ionization energy

D. Melting point
20N.1A.SL.TZ0.7:
Which of the following shows a general increase across period 3 from $Na$ to $Cl$ ?

A. Ionic radius

B. Atomic radius

C. Ionization energy

D. Melting point
20N.1A.SL.TZ0.7:
Which of the following shows a general increase across period 3 from $Na$ to $Cl$ ?

A. Ionic radius

B. Atomic radius

C. Ionization energy

D. Melting point
21M.1A.SL.TZ2.16:
Which represents electron affinity?

A. Al²⁺(g) → Al³⁺(g) + e⁻

B. C (g) + e⁻ → C⁻(g)

C. Cl₂(g) → 2Cl (g)

D. S (s) → S⁺(g) + e⁻
21M.1A.SL.TZ2.16:
Which represents electron affinity?

A. Al²⁺(g) → Al³⁺(g) + e⁻

B. C (g) + e⁻ → C⁻(g)

C. Cl₂(g) → 2Cl (g)

D. S (s) → S⁺(g) + e⁻
21M.1A.SL.TZ2.16:
Which represents electron affinity?

A. Al²⁺(g) → Al³⁺(g) + e⁻

B. C (g) + e⁻ → C⁻(g)

C. Cl₂(g) → 2Cl (g)

D. S (s) → S⁺(g) + e⁻
21M.1A.SL.TZ2.16:
Which represents electron affinity?

A. Al²⁺(g) → Al³⁺(g) + e⁻

B. C (g) + e⁻ → C⁻(g)

C. Cl₂(g) → 2Cl (g)

D. S (s) → S⁺(g) + e⁻
21M.1A.SL.TZ1.8: Which trend is correct, going down group 1? A. Melting point increases B. Reactivity...
21M.1A.SL.TZ1.8: Which trend is correct, going down group 1? A. Melting point increases B. Reactivity...
21M.1A.SL.TZ1.8: Which trend is correct, going down group 1? A. Melting point increases B. Reactivity...
21M.1A.SL.TZ1.8: Which trend is correct, going down group 1? A. Melting point increases B. Reactivity...
21M.1A.SL.TZ2.7: Which property increases down group 1? A. atomic radius B. electronegativity C. first...
21M.1A.SL.TZ2.7: Which property increases down group 1? A. atomic radius B. electronegativity C. first...
21M.1A.SL.TZ2.7: Which property increases down group 1? A. atomic radius B. electronegativity C. first...
21M.1A.SL.TZ2.7: Which property increases down group 1? A. atomic radius B. electronegativity C. first...
21M.2.SL.TZ1.1b:
Justify why sulfur is classified as a non-metal by giving two of its chemical properties.
21M.2.SL.TZ1.1b:
Justify why sulfur is classified as a non-metal by giving two of its chemical properties.
21M.2.SL.TZ1.b:
Justify why sulfur is classified as a non-metal by giving two of its chemical properties.
21M.2.SL.TZ1.1b:
Justify why sulfur is classified as a non-metal by giving two of its chemical properties.
21M.2.SL.TZ1.1b:
Justify why sulfur is classified as a non-metal by giving two of its chemical properties.
21M.2.SL.TZ1.b:
Justify why sulfur is classified as a non-metal by giving two of its chemical properties.
21M.2.SL.TZ1.1b:
Justify why sulfur is classified as a non-metal by giving two of its chemical properties.
21M.2.SL.TZ1.1b:
Justify why sulfur is classified as a non-metal by giving two of its chemical properties.
21M.2.SL.TZ1.b:
Justify why sulfur is classified as a non-metal by giving two of its chemical properties.
21M.2.SL.TZ1.1b:
Justify why sulfur is classified as a non-metal by giving two of its chemical properties.
21M.2.SL.TZ1.1b:
Justify why sulfur is classified as a non-metal by giving two of its chemical properties.
21M.2.SL.TZ1.b:
Justify why sulfur is classified as a non-metal by giving two of its chemical properties.
21M.2.SL.TZ2.2a(i): Explain why Si has a smaller atomic radius than Al.
21M.2.SL.TZ2.2a(i): Explain why Si has a smaller atomic radius than Al.
21M.2.SL.TZ2.a(i): Explain why Si has a smaller atomic radius than Al.
21M.2.SL.TZ2.2a(i): Explain why Si has a smaller atomic radius than Al.
21M.2.SL.TZ2.2a(i): Explain why Si has a smaller atomic radius than Al.
21M.2.SL.TZ2.a(i): Explain why Si has a smaller atomic radius than Al.
21N.2.SL.TZ0.2: Explain the general increase in trend in the first ionization energies of the period 3 elements,...
21N.2.SL.TZ0.2: Explain the general increase in trend in the first ionization energies of the period 3 elements,...
21N.2.SL.TZ0.2: Explain the general increase in trend in the first ionization energies of the period 3 elements,...
21N.2.SL.TZ0.2: Explain the general increase in trend in the first ionization energies of the period 3 elements,...
22M.1A.SL.TZ2.5: What is the correct order for increasing first ionization energy? A. Na < Mg < Al B. Na...
22M.1A.SL.TZ2.5: What is the correct order for increasing first ionization energy? A. Na < Mg < Al B. Na...
22M.1A.SL.TZ2.5: What is the correct order for increasing first ionization energy? A. Na < Mg < Al B. Na...
22M.1A.SL.TZ2.5: What is the correct order for increasing first ionization energy? A. Na < Mg < Al B. Na...
22M.1A.SL.TZ2.7: Three elements, X, Y, and Z are in the same period of the periodic table. The relative sizes of...
22M.1A.SL.TZ2.7: Three elements, X, Y, and Z are in the same period of the periodic table. The relative sizes of...
22M.1A.SL.TZ2.7: Three elements, X, Y, and Z are in the same period of the periodic table. The relative sizes of...
22M.1A.SL.TZ2.7: Three elements, X, Y, and Z are in the same period of the periodic table. The relative sizes of...
22M.2.SL.TZ2.2a:
Explain why the first ionization energy of calcium is greater than that of potassium.
22M.2.SL.TZ2.2a:
Explain why the first ionization energy of calcium is greater than that of potassium.
22M.2.SL.TZ2.a:
Explain why the first ionization energy of calcium is greater than that of potassium.
22M.2.SL.TZ2.2a:
Explain why the first ionization energy of calcium is greater than that of potassium.
22M.2.SL.TZ2.2a:
Explain why the first ionization energy of calcium is greater than that of potassium.
22M.2.SL.TZ2.a:
Explain why the first ionization energy of calcium is greater than that of potassium.

Sub sections and their related questions

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