atom smallest particle of an element with all its properties
TRANSCRIPT
ATOM
Smallest particle of an element with all its
properties
Periodic Table
H
ATOMIC NUMBER
SYMBOL
ATOMIC MASS
1
1.0079
Three main parts
•+PROTON
+NEUTRON
+ELECTRON
PARTICLE LOCATION CHARGE MASS
PROTON NUCLEUS POSITIVE
+
1 A.M.U
ELECTRON ELECTRON CLOUD
NEGATIVE
-1/1836 A.M.U
NEUTRON NUCLEUS NONE 1 A.M.U
Most of an atom is empty space. The nucleus of the atom contans amost all of the mass of the atom. A greatly enlarged atom might look like a marbel (the nuceus)insde an empty football stadium .
TO FIND # OF PROTONS
•ATOMIC NUMBER = NUMBER OF PROTONS
• NUMBER OF PROTONS = NUMBER OF ELECTRONS
NEUTRON• Atomic mass (rounded off)
-subtract
ATOMIC NUMBER
_____________________
NUMBER OF NEUTRONS
ISOTOPE• ATOMS OF THE SAME
ELEMENT WITH THE SAME NUMBER OF PROTONS/ELECTRONS BUT A DIFFERENT # OF NEUTRONS
CARBON ISOTOPE• HOW MANY
PROTONS, ELECTRONS AND NEUTRONS
• HOW MANY PROTONS, ELECTRONS NEUTRONS
COMPARE THE TWO CARBONS
1. HOW DOES THE MASS COMPARE
2. HOW DO THE PROTONS COMPARE
3. HOW DO THE NEUTRONS COMPARE
BORON• PROTONS=• ELECTRONS=• NEUTRONS=
ATOMIC NUMBER=ATOMIC MASS=
DEMOCRITUS
• 440 B.C
• DEVELOPED THE FIRST ATOMIC THEORY
DALTON THEORY• 1802
• ATOMS CANNOT BE BROKEN INTO SMALLER PIECES
• IN ANY ELEMENT, ATOMS ARE EXACTLY ALIKE
ATOMS OF TWO OR MORE ELEMENTS CAN COMBINE TO FORM COMPOUNDS
ATOMS OF EACH ELEMENT HAVE A UNIQUE MASS
MASSES OF THE ELEMENTS IN A COMPOUNDS ARE ALWAYS CONSTANT RATIO