Chemistry - C1 AQA quick quiz

Substances that contain only one type of atom element compound particle( atom, element, compound, particle ) are called elements compound mixture atoms( elements, compound, mixture, atoms ). Byt when atoms of different elements join together, they form compounds mixture elements impurities( compounds, mixture, elements, impurities ).

An isotope is an element that has a different number of neutrons Protons electrons( neutrons, Protons, electrons ), but the same number of Protons neutrons atoms( Protons, neutrons, atoms ). So isotopes have a different the same( a different, the same ) mass, but the same a different( the same, a different ) charge. Many elements can exist as a different number of isotopes, relative atomic formula( atomic, formula ) mass (Ar) (atomic mass) (Fm) (ar)( (Ar), (atomic mass), (Fm), (ar) ) is used instead of mass number. This is an average the best the simplest a general( an average, the best, the simplest, a general ) mass, taking into account the all the different masses of the different isotopes elements atoms nuclei( isotopes, elements, atoms, nuclei ).