U2 - Development of atomic model Flashcards
Name the few scientist who contributed to the development of the atomic model
DJJENJ —–Rythem
Democritus
J Dalton
J J Thompson
Ernest Rutherwood
Niels Bhor
James Chadwhick
What discoveries did each scientist make
Democritus - matter consists of particles not divisible
J Dalton - Atom
J J Thompson - Electron
Earnest Rutherwood - nucleus + proton
Niels Bhor - Shells
James Chadwick - Neutron
Def: Periodic table
system of classifying elements according to their atomic num
Liquids in the periodic table
Hg
Br
Gasses in the periodic table
N
F
Cl
(noble gases)
Name the diatomic elements
H2
N2
F2
Cl2
Br2
I2
O2
Def: Diatomic elements
2 atoms of the same kind covalently bonded
What does the bold step line do
It separates the metals from the non-metals
What kind of metals surround the bold step line
Metaloids
What is the atomic number
number of protons
What is the mass number
number of protons and neutrons
How do electrons move around
in shells or energy levels
What are neutral atoms
they contain equal num of electrons and protons
What is an ion
an atom with a charge
