Definitions Flashcards
Relative atomic mass
The weighted mean of a n atom of an element relative to 1/12th of the mass of an atom of carbon-12
Relative isotopic mass
An atom of an element which have a set atomic number of protons and electrons but different numbers of neutrons - relative to 1/12th of the mass of carbon-12
Element
An element cannot be chemically broken down in to smaller substances and are primary constituents of matter. Each element is distinguished by set numbers of protons, electrons and neutrons
Compound
A ‘mixture’ composed of two or more elements
Ion
An atom or molecule with a net electrical charge due to the loss or gain of one or more electrons
Isoelectronic
When the atomic number is changed, as electrons are lost or gained, which make them the same as a noble gas
Dative bond
A bond in which only one of the element supplies the electron pair which is shared
Giant
A Giant ionic structure is giant as you are able to state the amount of ions there actual are.
Strong acid
Relaxes all of its hydrogen atoms - completely dissociates
Weak acid
Only relaxes a small proportion of its hydrogen atoms - partially dissociates
Acid
A proton donor
Base
Proton acceptor
Alkali
Soluble base that relaxes OH- in aqueous solutions
Salt
Formed when an acid has one or more of its hydrogen ions replaced by either a metal ion or an ammonium ion
Reducing agent
The chemical that is oxidised in a reaction
