The Periodic Table: Chemical Periodicity - exam practice

This question is about trends in the periodic table.

Which trend is correct?

Which equation represents the third ionisation energy for element J?

Which observations are made when a sample of silicon chloride, SiCl₄, is added to a beaker of water?

The melting points of the period 3 elements sodium to aluminium are shown in the table below.

Which factor explains the increase in melting points from sodium to aluminium?

Which factor helps to explain why the first ionisation energies of the group I elements decrease from lithium to sodium to potassium to rubidium?

X and Y are elements in period 3 of the periodic table.

● The oxide of X is a solid at room temperature. This oxide has a giant structure.

● The chloride of X does not react with water.

● Argon is the only element in period 3 with a lower melting point than Y.

What could be the formula of a compound formed between elements X and Y?

Which element has the second smallest atomic radius in its group and the third lowest first ionisation energy in its period?

Why is the second ionisation energy of sodium larger than the second ionisation energy of magnesium?

Consecutive elements X, Y and Z are in period 3 of the periodic table. Element Y has the highest first ionisation energy and the lowest melting point of these three elements.

What are the identities of X, Y and Z?

Which statement describes the trends of electronegativity values in the periodic table?

The 1^st to 8^th successive ionisation energies, in kJ mol^-1, of an element in period 3 are:

1,012 1,903 2,912 4,957 6,274 21,269 25,398 29,855

What is the element?

Which statement best explains why nitrogen has a larger first ionisation energy than oxygen?

Which change requires the largest amount of energy?

Which element is classified as a d block element?

Which element in period 3 has the highest melting point?

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

The diagram shows how a property of period 3 elements varies across the period.

What is the property?

Which element has the highest first ionisation energy?

Which oxide does not react with cold dilute sodium hydroxide to produce a salt?

X is the oxide of a period 3 element. X reacts with water to give an acidic solution.

A solution is prepared by reacting 0.100 g of X with excess water. This solution was neutralised by exactly 25.0 cm³

of 0.100 mol dm^-3 sodium hydroxide solution.

What could be the identity of X?

Which property is notassociated with the element sodium?

Which element of the third period requires the least number of moles of oxygen for the complete combustion of 1 mol of the element?

Which oxide is insoluble in aqueous sodium hydroxide?

An element Y reacts according to the following sequence.

What could be element Y?

Which is the equation for the reaction when steam passes over strongly heated magnesium?

Which products are formed when magnesium reacts with steam?

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

Which of the following sets of data showing the first four ionisation energies, in kJ mol^-1, of four elements is most likely to belong to boron?