Chemistry Definitions Flashcards
Alkali metals
Group 1 elements
Alkanes
Saturated hydrocarbons
Alloy
A mixture with at least 1 metal
Anode
Positively charged electrode
Atom
The smallest quantity of an element that can take part in a chemical reaction
Atomic number
Number of protons in the atoms nucleas
Avogrado constant
The number of particles in one mole of any substance
Boiling point
The specific temperature where a pure substance changes state from liquid to gas to gas to liquid
Cathode
A negatively charged electrode
Charge
A property of matter that causes it to experience a force when placed in an electric field
Chromatography
A separation technique used to separate the coloured components of mixtures
Combustion
Burning
Conservation of mass
The total mass of the products of a chemical reaction is always equal to the total mass of the reactants
Covalent bond
A shared pair of electrons between atoms in a molecule
Crystallisation
Technique used to obtain a soluble solid from a solution
Diamond
A form of carbon, a hard and giant covalent structure
Displacement reaction
A reaction which a more reactive metal displaces a less reactive metal from a solution of its salt
Ecosystem
Organisms in living/ non - living parts of the habitat
Electrostatic
Force of attraction between oppositely charged species
Element
A substance made of 1 type of atom
Equilibrium
When the rate of forward reaction is equal to the rate of backwards reaction
Exothermic reaction
A reaction which gives out energy to its surroundings
Filtration
Separation techniques used to separate insoluble and soluble solids
Fractional distillation
A separation technique used to separate mixtures with components that have similar boiling points
