WJEC GCSE Chemistry Specification Overview

These flashcards cover key concepts and terminology from the WJEC GCSE Chemistry specification to aid students in understanding and preparing for their exams.

Qualifications Wales

The regulatory body responsible for ensuring qualifications in Wales meet required standards.

WJEC

The Welsh Joint Education Committee, which creates and administers GCSE qualifications in Wales.

Unit 3

A new component of the GCSE Chemistry specification starting from first teaching in 2026.

Scientific Enquiry Skills

Skills related to the process of scientific investigation, including formulating questions, collecting data, and analyzing results.

Higher Tier

The tier of assessment for GCSE Chemistry which targets grades A*-D.

Foundation Tier

The tier of assessment for GCSE Chemistry which targets grades C-G.

Exothermic Reaction

A chemical reaction that releases energy in the form of heat.

Endothermic Reaction

A chemical reaction that absorbs energy from its surroundings.

Avogadro Constant

The number of atoms, molecules or particles in one mole of a substance, approximately $6.02 imes 10^{23}$.

Neutralisation Reaction

The reaction between an acid and a base that produces a salt and water.

Reversible Reaction

A reaction that can proceed in both the forward and reverse directions.

Periodic Table

A tabular arrangement of chemical elements based on their atomic number and properties.

Alkaline

A term describing substances that have a pH greater than 7 and can neutralize acids.

Acidic

A term describing substances that have a pH less than 7.

Ionic Bonding

A type of chemical bond formed through the electrostatic attraction between oppositely charged ions.

Covalent Bonding

A type of chemical bond formed when two atoms share electrons.

Titration

A laboratory method of quantitative chemical analysis to determine the concentration of an identified analyte.

Hydrocarbon

Compounds composed solely of hydrogen and carbon atoms, typically derived from crude oil.