elements, compounds and mixtures

Cards (12)

what is an element?
substance made up from atoms that have the same number of protons in their nucleus
what is an isotope? 
version of an element with a different number of neutrons but the same number of protons and electrons
what is the equation for isotopes(relative atomic mass)?
relative atomic mass=sum of(isotope abundance x isotope mass number) ➗ 100
what are compounds? 
substances formed by two or more elements held together by chemical bonds, properties of a compound are usually totally different from properties of original elements
formula for hydrochloric acid
HCL
formula for sulfuric acid
H2SO4
formula for nitric acid  
HNO3
formula for sodium chloride(salt) 
NaCl
formula for carbon monoxide
CO
formula for calcium chloride
CaCl2
formula for sodium carbonate
Na2CO3
what is a mixture?
a combination of two or more substances(element or compound) that are not chemically bonded and can e seperated by a physical method(filtration)