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L1 Atomic Structure
Definitions for part A of acids and bases AS90944
| Term | Definition |
|---|---|
| Monoatomic ions | Ions with only one atom. |
| Atom | The smallest particle of an element. |
| Atomic number | The number of protons in the nucleus of an atom. |
| Mass number | The number of protons plus the number of neutrons in the nucleus of an atom. |
| Charge | The amount of electricity on a particle – positive or negative. |
| Proton | Positively charged subatomic particle found in the nucleus of an atom. |
| Neutron | Neutral subatomic particle found in the nucleus of an atom. |
| Electron | Negatively charged subatomic particles found moving rapidly around the nucleus. |
| Electron Arrangement (configuration) | The position of the electrons in the energy level around the nucleus |
| Element | A substance which is composed of only one type of atom. |
| Compound | A substance which is composed of two or more different types of atoms chemically bonded. |
| Isotopes | Atoms with the same number of protons but different numbers of Neutrons. |
| Reaction rates | The speed at which a chemical reaction occurs. |
| Particles | Atoms, molecules or ions. |
| Ion | Atoms or groups of atoms which have lost or gained electrons to become a charged particle. |
| Ionic bonding | Strong electrostatic attraction between positive and negative ions to form a large 3D network. |
| Ionic compound | Substance composed of oppositely charged ions (metal with non-metal) |
| Formula | Symbol representation of the atoms present in a substance. |
| Symbol Equation | Symbol representation of the reactants and products of a chemical reaction. |
| Word Equation | Word representation of a chemical equation. |
| Metal oxide | Ionic substance consisting of a metal and oxygen. (eg MgO) |
| Metal hydroxide | Ionic substance consisting of a metal and hydroxide ions. (eg NaOH) |
| Metal carbonate | Ionic substance consisting of a metal and carbonate ions (eg CaCO3 ) |
| Metal bicarbonate | Ionic substance consisting of a metal and a hydrogen carbonate ion. ( eg NaHCO3 ). |