what is the structure of an atom
built up of protons, electrons and neutrons
protons has a +1 charge
neutrons has a 0 charge
electrons have a -1 charge
protons and neutrons are inside the nucleas
what is
element
isotope
RAM
ELEMENT- a pure substance with only one type of atom
ISOTOPE- an element with the same number of protons but different number of neutrons
RAM- how much the atom weighs
what is a compound
a molecule with 2 or more elements chemically bonded
what is the plum pudding model
a ball of positively charges inside was negative electrons created by jj thompson.
What is the nuclear model?
mass in the middle
empty space all around
electrons on the outside created by rutherford
What did chadwick do?
created the idea of a neutrons being inside the nucleas
What did Niels Bohr do?
electrons were on shells
what is the periodic table
a table of chemical elements organised in rows
who discovered the periodic table
Mendeleev
what is group 1
elements with 1 electron on the outer shell
alkali metals
what is group 7
elements with 7 electron on the outer shell
majority or all are non-metals
what is group 0
full outer electron shell
noble gases
