Module 3 - F321

Question 1

Period

Answer 1

A period is a horizontal row of elements in the Periodic table. Elements show trends in properties across a period.

Question 2

Periodicity

Answer 2

Periodicity is a regular periodic variation of properties of elements with atomic number and position in the Periodic Table.

Question 3

Group

Answer 3

A group is a vertical column in the periodic table. Elements in a group have similar chemical properties and their atoms have the same number of outer-shell electrons.

Question 4

Thermal decomposition

Answer 4

Thermal decomposition is the breaking up of a chemical substance with heat into at least two chemical substances.

Question 5

Displacement reaction

Answer 5

A displacement reaction is a reaction in which a more-reactive element displaces a less-reactive element from an aqueous solution of the latter’s ions.

Question 6

Disproportionation

Answer 6

Disproportionation is the oxidation and reduction of the same element in a redox reaction.

Question 7

Precipitation reaction

Answer 7

A precipitation reaction is the formation of a solid from a solution during a chemical reaction. Precipitates are often formed when two aqueous solutions are mixed together.