Presentation on theme: "The three SUBATOMIC PARTICLES are"— Presentation transcript:
1 The three SUBATOMIC PARTICLES are ProtonElectronNeutron
2 PROTON Symbol charge location p+ +1 Mass in the nucleus same as neutron
3 ELECTRON Symbol charge Location Mass e- -1 outside the nucleus tiny; 1/2000 of a proton
4 Force inside atomsElectrons are bound to the nucleus by the attractive force between electrons (-) and protons (+).
5 NEUTRONSymbol n charge 0Location in the nucleusMass same as proton
6 Pb Element Card 82 Lead 207.2 Atomic Number Element Symbol Element NameAtomic Mass
7 ATOMIC NUMBER – equals the number of protons in an atom of an element Element CardAtomic Number82PbLead207.2
8 Atomic Number Number of Protons ATOMIC NUMBER – equals the number of protons in an atom of an elementElementAtomic NumberNumber of ProtonsCarbon6Calcium20Silver47
9 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
10 ElementAtomic NumberNumber of ProtonsNumber of ElectronsOxygen8Copper29Gold79
11 MASS NUMBER – the sum of the protons and neutrons in the nucleus 82PbLead207.2Atomic Mass
12 19 20 6 27 13 66 30 The number of neutrons = mass number – atomic numberMass NumberNumber of Protons(Atomic Number)Number of Neutrons1920627136630
13 ISOTOPES – atoms of the same element have different numbers of neutrons Mass NumberAtomic NumberNumber of ProtonsNumber of NeutronsOxygen - 168Oxygen - 17Oxygen - 18
14 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.