A level Chemistry Periodicity

Which element is in the f-block of the Periodic Table?

• Palladium

• Phosphorus

• Platinum

• Plutonium

Which of these decreases down Group 2?

• First ionisation energy

• Atomic radius

• Number of protons

• Reactivity with water

Which statement about barium sulfate is correct?

• It is soluble in water at a temperature of 100 °C.

• It is used in medicine because it does not dissolve in body fluids.

• It is a pale yellow solid.

• It reacts with acidified barium chloride solution.

Which products are formed when magnesium reacts with steam?

• Magnesium hydroxide and hydrogen

• Magnesium hydroxide and oxygen

• Magnesium oxide and hydrogen

• Magnesium oxide and oxygen

Sulfur dioxide (SO₂) is produced when some fossil fuels are burned. Which of the following statements is true?

• Sulfur dioxide can be removed from waste gases in a power station by an acid-base reaction with calcium oxide.

• Sulfur dioxide is insoluble in water.

• Sulfur dioxide is a basic oxide.

• Sulfur dioxide is an ionic compound.

Which one of the following is not a correct trend down Group VII?

• The first ionisation energy of the atom decreases.

• The oxidising power of the element increases.

• The electronegativity of the atom decreases.

• The boiling point of the element increases.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which statement about astatine is correct?

• Astatine has a greater electronegativity than bromine

• Astatine is a better oxidising agent than bromine

• Astatine has a greater boiling point than bromine

• Astatine has a greater first ionisation energy than bromine

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The boiling points of the halogens increase down Group VII because

• covalent bond strengths increase.

• bond polarities increase.

• the surface areas of the molecules increase.

• electronegativities increase.

Which is the formula of the main aluminium-containing species present when aluminium oxide is added to an excess of water?

• [Al(H₂O)₆]³⁺(aq)

• Al(H₂O)₃(OH)₃(s)

• [Al(H₂O)₂(OH)₄]⁻(aq)

• Al₂O₃(s)

Tags

NGSS.HS-PS1-3

Which element forms an ionic oxide that reacts with strong alkalis?

• Aluminium

• Magnesium

• Sodium

• Sulfur