The Atom Flashcards
John Dalton
Solid Spheres made up of different elements.
JJ Thompson
Atoms must contain smaller negatively charged particles-electrons. The plum pudding model
Ernest Rutherford
gold foil experiment-podstivly charged nucleus surrounded by a cloud of electrons. most of the atom is empty space
Relative mass and charge of a proton
1 +1
Relative mass and charge of a neutron
1 0
Relative mass and charge of a electron
0.0005 -1
What is an isotope
different forms of the same element. different number of neutrons
Relative Atomic Mass
sum of (isotope abundance x isotope mass number) sum of abundance of all the isotopes
electron configuration
2.8.8.18
negative ion
anions
positive ion
cation
properties of simple molecular substances
low melting and boiling points
gases or liquids at room temperature
don’t conduct electricity
properties of giant covalent structures
hight melting and boiling points
don’t conduct electricity
aren’t soluble in water
what giant covalent structures conduct electricity
graphite and graphene