Zusammenfassung der Ressource
C1.1 Fundamental Ideas
- Atoms
- Make up elements
- Sorted into groups
- Periodic Table
- Groups contain elements with similar
properties
- Elements are represented by a
chemical symbol
- Have a small central nucleus
- Made up of protons and neutrons
- Protons have a +1 charge
- Neutrons have 0 charge
- Number of protons/ electrons
- Atomic number
- Number of protons and neutrons
- Mass number
- Surrounded by electrons
- Electrons have a -1 charge
- Occupy energy shells
- 2,8,8
- Occupy the lowest available energy shell
- Have no overall charge
- Periodic Table
- Elements in groups
- Same number of electrons in highest energy level
- Similar chemical properties
- Group 0
- Noble gases
- Unreactive
- Stable
- Full shells
- Chemical Reactions
- Atoms join together
- Form compounds
- Give, take or share electrons
- Form ions
- From metals and non metals
- Form Molecules
- From non-metals
- Covalent bonds
- Represented by word or symbol equations
- Symbol equations might need to be balanced
- No atoms made or lost
- mass of products = mass of reactants