Edexcel GCSE Chemistry 1CH0 · 1.4
Equal numbers of protons and electrons
- Code
- 1.4
- In
- 1 Key concepts in chemistry
- Course
- GCSE Chemistry 1CH0
- Board
- Edexcel
Grade boundaries·Edexcel command words
Codes and titles are read by a script from Edexcel's published specification and have not been checked by a person. What each point covers is in the specification itself: Edexcel’s specification.
Points in 1 Key concepts in chemistry
- 1.1 Development of the model of the atom
- 1.2 Structure of an atom
- 1.3 Relative charge and mass of subatomic particles
- 1.4 Equal numbers of protons and electrons
- 1.5 Size of the nucleus
- 1.6 Mass concentrated in the nucleus
- 1.7 Mass number
- 1.8 Proton number unique to each element
- 1.9 Isotopes
- 1.10 Numbers of protons, neutrons and electrons in atoms
- 1.11 Isotopes and non-integer relative atomic masses
- 1.12 Calculating relative atomic mass
- 1.13 Mendeleev's periodic table
- 1.14 Mendeleev's predictions of undiscovered elements
- 1.15 Mendeleev's ordering and relative atomic mass
- 1.16 Atomic number and position in the periodic table
- 1.17 Periods and groups in the periodic table
- 1.18 Metals and non-metals in the periodic table
- 1.19 Electronic configurations of the first 20 elements
- 1.20 Electronic configuration and periodic table position
- 1.21 Formation of ionic bonds
- 1.22 Definition of an ion
- 1.23 Protons, neutrons and electrons in simple ions
- 1.24 Formation of ions in ionic compounds
- 1.25 The endings -ide and -ate
- 1.26 Formulae of ionic compounds
- 1.27 Ionic lattice structures
- 1.28 Formation of covalent bonds
- 1.29 Covalent bonding forming molecules
- 1.30 Size of atoms and small molecules
- 1.31 Dot and cross diagrams of simple molecules
- 1.32 Classifying substances by structure and bonding
- 1.33 Properties of ionic compounds
- 1.34 Properties of simple molecular compounds
- 1.35 Graphite and diamond as giant covalent substances
- 1.36 Structures of graphite and diamond
- 1.37 Uses of graphite and diamond
- 1.38 Fullerenes and graphene
- 1.39 Simple polymers such as poly(ethene)
- 1.40 Properties of metals
- 1.41 Limitations of models and representations
- 1.42 Physical properties of metals and non-metals
- 1.43 Relative formula mass and percentage by mass
- 1.44 Empirical formulae from reacting masses
- 1.45 Empirical and molecular formulae
- 1.46 Experiment to find an empirical formula
- 1.47 Conservation of mass
- 1.48 Reacting masses from equations
- 1.49 Concentration in g dm⁻³
- 1.50 The mole and the Avogadro constant
- 1.51 Calculating moles and numbers of particles
- 1.52 Limiting reactants
- 1.53 Stoichiometry from reacting masses