Studied by 7 peopleincreasing atomic number
Periodic table in ordered by_____
groups
Vertical columns called_____
amount of electrons in an elements outer shell
Groups are determined by________
rows
Horizontal columns called_____
Dmitri mendeleev
___left gaps in the periodic table for undiscovered elements
John dalton
_______described atoms as tiny, solid spheres
J.J. Thompson
________created the plum pudding model
weren’t solid spheres
The plum pudding model concluded atoms_______
atom must contain even smaller, negatively charged particles
Plum pudding model showed an_______with electrons stuck in it
ernest rutherford
______fired charged alpha particles at a thing sheet of gold foil
Nuclear model
________tiny, positively charged nucleus at the centre, where most of the mass is concentrated. A ‘cloud’ of negative electrons surrounds this nucleus-so most of the atom is empty space
existence of the proton
_______was proved by james chadwick
electronic structure goes
_______ in the structure 2.8.8.18.18.32.32
a full outer shell
atoms better when they have_______
mass number
is the total amount of neutrons and protons
atomic number
_______is the amount of protons
electrons
protons are the same amount as____
neutral
atom are naturally____
amount of shells
Rows are determined by___
Note
Flashcard