the three subatomic particles are
DESCRIPTION
The three SUBATOMIC PARTICLES are. Proton . Electron. Neutron. PROTON Symbol charge location Mass . +1 . p+. in the nucleus. same as neutron. e- . -1 . ELECTRON Symbol charge Location Mass . outside the nucleus. tiny; 1/2000 of a proton. - PowerPoint PPT PresentationTRANSCRIPT
The three
SUBATOMIC PARTICLES
areProton
Electron Neutron
PROTONSymbol charge
location
Mass
in the nucleus
same as neutron
+1 p+
ELECTRONSymbol charge
Location
Mass
e- -1
tiny; 1/2000 of a proton
outside the nucleus
Force inside atoms
• Electrons are bound to the nucleus by the attractive force between electrons (-) and protons (+).
NEUTRON
Symbol n charge 0
Location in the nucleus
Mass same as proton
Element Card
82
PbLead
207.2
Atomic Number
Element Symbol
Element Name
Atomic Mass
ATOMIC NUMBER – equals the number of protons in an atom of an element
82
PbLead
207.2
Atomic Number
Element Card
ATOMIC NUMBER – equals the number of protons in an atom of an element
Element Atomic Number
Number of Protons
Carbon 6
Calcium 20
Silver 47
BALANCING CHARGE* the +1 charge of a proton exactly equals the -1 charge of an electron
* all atoms are electrically neutral * in an atom the number of
protons equals the number of electrons
Element Atomic Number
Number of Protons
Number of Electrons
Oxygen 8
Copper 29
Gold 79
MASS NUMBER – the sum of the protons and neutrons in the nucleus
Atomic Mass
82
PbLead
207.2
• The number of neutrons = mass number –
atomic number
Mass Number
Number of Protons(Atomic Number)
Number of Neutrons
19 206 6
27 1366 30
• ISOTOPES – atoms of the same element have different numbers of neutrons
Isotope Mass Number
Atomic Number
Number of Protons
Number of Neutrons
Oxygen - 16 8
Oxygen - 17
Oxygen - 18
To summarize isotopes:
They are atoms of the same element
They have the same number of protons .
They have different number of neutrons .
They have different mass numbers.
They have the same chemical and physical properties.