chemistry Flashcards
(18 cards)
why do atoms have no overall charge?
equal number of protons and electrons that cancel each other out
where can you find the overall no of protons ?
atomic number in an atom (bottom)
what are isotopes ?
atoms of the same element(protons) but different neutrons
what do you call atoms that gain or loose electrons and how do you show mg and br?
IONS Mg2- ,Br1+
independent ,dependant,control?
change,measure,keep the same
synonyms for solution
concentration or volume
synonyms for solid
mass or surface area
what is the equations for moles ?
mass/mr
what is ionic bonding ?
the strong electrostatic force between a positive and negative charge ion
what is metallic bonding ?
the electrons in the outer shell are de-localised so they are free to move around the structure
the only non-metal in a compound (oxygen) =
+oxygen
the non-metal in a compound =
+ide e.g(chloride)
oxygen and another non-metal in a compound become=
+ate e.g chlorine and oxygen become chlorate
relative atomic mass (mr)equation=
adding together the relative atomic masses shown
how are ionic compounds held together?
by strong electrostatic force of attraction of opposite charges
what do ionic compounds form?
giant ionic lattice
what are the properties of giant ionic lattice?
strong,high mp and bp,can conduct when in molten or in solution
what are the properties of simple covalent bonds?
covalent bonds within the molecules strong,the forces between molecules are weak
