AQA Year 1 Periodicity

Which element is classified as a d block element?

• Antimony

• Molybdenum

• Strontium

• Uranium

Which element in Period 3 has the highest melting point?

• Aluminium

• Silicon

• Sodium

• Sulfur

Which ion has the largest radius?

• F^–

• Mg²⁺

• Na⁺

• O^2–

Which element has a first ionisation energy lower than that of sulfur?

• Chlorine

• Oxygen

• Phosphorus

• Selenium

Which represents the correct order of increasing radius of the ions?

• F^– O^2– Li⁺ Be²⁺

• Li⁺ Be²⁺ O^2– F^–

• Be²⁺ Li⁺ F^– O^2–

• O^2–  F^–  Li⁺  Be²⁺

Which of these elements has the highest melting point?

• Argon

• Chlorine

• Silicon

• Sulfur

The diagram shows how a property of Period 3 elements varies across the period. What is the property?

• Atomic radius

• Electronegativity

• First ionisation energy

• Melting point

Which element has the highest first ionisation energy?

• Aluminium

• Phosphorus

• Silicon

• Sulfur

Which is the correct classification for the element yttrium (Y)?

• s block

• p block

• d block

• f block

Which of the following is a correct statement about the trend in atomic radius across Period 3 of the Periodic Table?

• radius increases because the atoms have more electrons

• radius decreases because nuclear charge increases

• radius increases because shielding (screening) increases

• radius decreases because shielding (screening) decreases