Flashcards in C2 Chemistry - atoms and compounds Deck (10)
what is the mass no*
total number of protons and neutrons
what is the stomic no*
no* of protons
how do you find the no* of neutrons?
subtract atomic no* - from the masss no*
how are compounds formed?
atoms or two or more elements are chemically combined together
what are isotopes?
different atomic forms of the same elements
same n* of protons
different n* of neutrons
how are ions formed?
when atoms lose or gain electrons
what are ions?
electrically charged particles
what does 'ionise' mean?
metal atoms and non-metal atoms go in an opposite direction
what happens to metal atoms?
they lose electrons and become positively charged