Definitions

• What group of the periodic table do alkali metals belong to?


  Group 1
• What is the smallest part of an element?


  Atom
• What is the atomic nucleus composed of?


  Protons and neutrons
• What does the atomic number represent?


  Number of protons
• What is chromatography used for?


  Separating a mixture of chemicals
• What is a compound?


  Substance of two or more types of atoms
• What is crystallisation used to produce?


  Solid crystals from a solution
• What occurs during a displacement reaction?


  A more reactive element displaces a less reactive one
• What is an electron?


  Negatively charged subatomic particle
• What are electron shells?


  Different energy levels in atoms
• What defines an element?


  Made up of only one type of atom
• What is filtration used for?


  Separating solids from liquids
• What is fractional distillation used for?


  Separating substances by boiling points
• What do groups in the periodic table represent?


  Different groups of elements
• What group do halogens belong to?


  Group 7
• What is an ion?


  Atom or molecule with an electric charge
• What is an isotope?


  Atoms with same protons, different neutrons
• What does mass number represent?


  Total number of protons and neutrons
• What are metals known for?


  Forming positive ions
• What is a mixture?


  Two or more elements not chemically combined
• What is a neutron?


  Neutral subatomic particle in the nucleus
• What group do noble gases belong to?


  Group 0
• What do non-metals form?


  Negative ions
• What does the nuclear model state?


  Mass is concentrated at the atom's center
• What is the periodic table?


  Table of elements by atomic number
• What does the plum pudding model suggest?


  Atom is a ball of positive charge
• What is a proton?


  Positively charged particle in the nucleus
• What is relative atomic mass?


  Average value considering isotope abundance
• What is simple distillation used for?


  Separating two liquids with different boiling points
• What are transition metals?


  Metallic elements in the middle of the table